CN104018490A - Z-shaped rectangular-section anti-skidding pile and construction method thereof - Google Patents
Z-shaped rectangular-section anti-skidding pile and construction method thereof Download PDFInfo
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- CN104018490A CN104018490A CN201410199122.8A CN201410199122A CN104018490A CN 104018490 A CN104018490 A CN 104018490A CN 201410199122 A CN201410199122 A CN 201410199122A CN 104018490 A CN104018490 A CN 104018490A
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Abstract
The invention discloses a Z-shaped rectangular-section anti-skidding pile and a construction method of the Z-shaped rectangular-section anti-skidding pile. The Z-shaped rectangular-section anti-skidding pile comprises a vertical pile body, a back side horizontal haunched beam and a face side horizontal haunched beam, and further comprises a back side inclined support and a face side inclined support, wherein the back side horizontal haunched beam is arranged on the back side of the vertical pile body, and the face side horizontal haunched beam is arranged on the face side of the vertical pile body. The Z-shaped rectangular-section anti-skidding pile and the construction method of the Z-shaped rectangular-section anti-skidding pile have the advantages that by combining the stress mode of the anti-skidding pile, the pile body bending moment and the space distribution characteristics of shearing force, the self-weight pressure of soil bodies at the back of and in front of the pile, the pressure resistance of a good ground and the weight-bearing skidding resistance of the horizontal haunched beams are fully played, the stress intensity of the pile body is effectively improved, and the bending resistance and shearing resistance of the anti-skidding pile are improved. The Z-shaped rectangular-section anti-skidding pile is simple in structural form, high in anti-skidding performance, easy to construct, suitable for a high steep slope or a foundation pit support project, and also suitable for a large landslide control project. The construction method of a manual hole digging pile is adopted and has the advantages of being high in bending resistance and shearing resistance, simple in process, high in quality reliability, low in manufacturing cost and the like.
Description
Technical field
The present invention relates to major landslip improvement, high steep stile slope and Base hole supporting technology field, be specifically related to a kind of Z-shaped square-section antislide pile and construction method thereof.
Background technology
The measure of administering at present landslide, side slope mainly contains draining, a gear, anchoring, loss of weight and back-pressure etc.The advantages such as wherein antislide pile props up gear measure rigidity is large owing to himself having, self-stability can be better, easy construction, consolidation effect are obvious are able to extensive use in landslide control and side slope protection engineering.Antislide pile operating principle be mainly by the embedding of fixed section Rock And Soil make with and passive resisting force come Thrust of Landslide or the side slope soil pressure of balance free segment Rock And Soil, form soil arching effect by Rock And Soil between stake and the frictional resistance of stake both sides simultaneously, stop Rock And Soil between stake to be extruded between stake, make landslide or side slope keep balance or stable.
In existing antislide pile single pile design, pile body is all straight pilework conventionally, fails to take into full account the stake front and back comprehensive utilization of Rock And Soil and the spatial distribution characteristic of bending and shearing.When Thrust of Landslide or side slope soil pressure are when larger, often adopt and increase antislide pile section area and quantity of reinforcement or the measures such as prestress anchorage cable are set at pile body, to improve the anti-skid ability of antislide pile self, reach the object of balance Thrust of Landslide or side slope soil pressure.Not only engineering quantity is large, treatment cost is high to increase antislide pile section area and quantity of reinforcement measure, easily cause engineering waste, and in the time being subject to land red-line or existing construction of structures space constraint, site operation difficulty is larger, limit effective use of traditional antislide pile; Pile body arranges prestress anchorage cable measure, and because anchor cable cost is higher, working procedure is loaded down with trivial details, and anchor cable prestressing force is along with the increase of time easily produces relaxation loss, obviously not enough for permanent landslide or its reliability of Reinforcement Works of Rock Slopes.As can be seen here, how to take into full account the stake front and back comprehensive utilization of Rock And Soil and the stress characteristic of antislide pile pile body, the structural form of appropriate design antislide pile, is very important to cost-effective improvement major landslip and high steep stile slope.
Summary of the invention
The present invention seeks to for traditional anti-slide pile structure form in the limitation of administering in major landslip and high steep vertical slope project, be subject to the spatial distribution characteristic of force mode and bending and shearing in conjunction with antislide pile, making full use of after stake, after stake, the gravity pressure of Rock And Soil and the anti-pressure ability of good ground are as cutting point, provide little, cheap, the anti-skid performance of a kind of engineering quantity strong, be easy to construction, and can be widely used in Z-shaped square-section antislide pile and the construction method thereof of major landslip or high steep vertical slope treatment.
A kind of Z-shaped of the present invention square-section antislide pile, comprising: upright pile body, the horizontal haunched beam of dorsal part and the horizontal haunched beam of face side; The horizontal haunched beam of dorsal part is arranged on upright pile body dorsal part, and the horizontal haunched beam of face side is arranged on upright pile body face side.
Also comprise that dorsal part tiltedly holds in the palm, the horizontal haunched beam upside of described dorsal part is connected with uprightly pile body is vertical, and the horizontal haunched beam downside of dorsal part is tiltedly held in the palm and is connected by dorsal part with upright pile body.
Also comprise the holder of face skew back, the horizontal haunched beam downside of described face side is connected with uprightly pile body is vertical, and the horizontal haunched beam upside of face side is connected by the holder of face skew back with upright pile body.
The horizontal haunched beam of described dorsal part is arranged on upright pile body dorsal part, apart from the above distance I of intersection point of Side Slope crack face or landslide slide surface and upright pile body dorsal part
1be not less than 3.0m; The horizontal haunched beam of described dorsal part passes through Side Slope crack face or landslide slide surface extend into the degree of depth I in good ground
2be not less than 2.0m.
The described horizontal haunched beam of face side is arranged on upright pile body face side, apart from the following distance I of intersection point of Side Slope crack face or landslide slide surface and upright pile body face side
3be not less than 3.0m.
The described horizontal haunched beam of upright pile body, dorsal part and the horizontal haunched beam cross sectional shape of face side are rectangle, and sectional dimension is identical, upright pile body breadth of section B
1the horizontal haunched beam breadth of section of=dorsal part B
2the horizontal haunched beam breadth of section of=face side B
4=2.0 ~ 3.0m, upright pile body depth of section H
1the horizontal haunched beam depth of section of=dorsal part H
2the horizontal haunched beam depth of section of=face side H
4=2.0 ~ 3.0m.
The described horizontal haunched beam length of face side I
4be not less than the upright pile body breadth of section B of 2 times
1.
Described dorsal part tiltedly holds in the palm width B
3and height H
3be 1.0 ~ 2.0m.
Described face skew back holder width B
5and height H
5be 1.0 ~ 2.0m.
Described upright pile body is built by steel concrete.
A kind of Z-shaped of the present invention square-section anti-slide pile construction method, concrete steps are as follows:
A, the horizontal haunched beam epimere of dorsal part pile body pore-forming: adopt artificial vertical digging mode pore-forming, in pore forming process, one section of every excavation is built one section of steel concrete retaining wall, and circulation is constructed to the oblique backing face of dorsal part design elevation;
Described circulation construction sequence is as follows: every section of vertical cut degree of depth should be controlled between 0.5 ~ 1.0m, and breast wall concrete adopts C25 concrete, and thickness is not less than 20cm, after the preceding paragraph panelling construction completes, can carry out next section of excavation;
B, the horizontal haunched beam Liang Shen of dorsal part cavern pore-forming: adopt artificial horizontal digging mode pore-forming, in pore forming process, one section of every excavation adopts one section of the mode lining cutting such as anchor pole, spray concrete, and circulation construction is not less than 2.0m to stretching into Side Slope crack face or the landslide slide surface degree of depth;
Described circulation construction sequence is as follows: every section of horizontal cutting depth should be controlled between 1.0 ~ 2.0m, lining cutting mode is adjusted flexibly according to driving stratum characteristic, in soft rock or scall, adopt spray concrete and combining anchor to carry out lining cutting, in other stratum, adopt spray concrete to carry out lining cutting, after the preceding paragraph lining construction completes, can carry out next section of excavation;
C, the horizontal haunched beam fabrication of reinforcing cage of dorsal part are installed: reinforcing bar adopts usual manner to weld in Liang Shen cavern, reinforcing cage is from the progressively fabrication and installation toward hole of cavern's face, in fabrication and installation process, horizontal haunch beam main tendon should stretch out hole and is not less than 35 times of main muscle diameter lengths, and is bent in cavern;
Described welding step is as follows: between the main muscle of beam body and stirrup, adopt quincunx spot welding, between main muscle and main muscle, adopt overlap welding, fusion length is not less than 10 times of main muscle diameters;
Section pile body pore-forming between d, the horizontal haunched beam of dorsal part and the horizontal haunched beam of face side: adopt artificial vertical digging mode pore-forming, in pore forming process, one section of every excavation is built one section of steel concrete retaining wall, circulation is constructed to the horizontal haunched beam of face side bottom surface design elevation, and described circulation form of construction work is identical with step a;
E, the horizontal haunched beam Liang Shen of face side cavern pore-forming: adopt artificial horizontal digging mode pore-forming, in pore forming process, one section of every excavation adopts one section of the mode lining cutting such as anchor pole, spray concrete, circulation construction, the horizontal haunched beam Liang Shen of face side cavern length is not less than the upright pile body breadth of section of 2 times, and described circulation form of construction work is identical with step b;
F, the horizontal haunched beam fabrication of reinforcing cage of face side are installed: reinforcing bar adopts usual manner to weld in Liang Shen cavern, reinforcing cage is from the progressively fabrication and installation toward hole of cavern's face, in fabrication and installation process, horizontal haunch beam main tendon should stretch out hole and is not less than 35 times of main muscle diameter lengths, and be bent in cavern, so that the horizontal haunch beam main tendon of later stage face side and the main muscle of pile body weld, do not affect pile body pore-forming and reinforcing cage construction, described reinforcing cage welding manner is identical with step c simultaneously;
G, the horizontal haunched beam hypomere of face side pile body pore-forming: adopt artificial vertical digging mode pore-forming, in pore forming process, one section of every excavation is built one section of steel concrete retaining wall, circulation is constructed to design elevation at the bottom of antislide pile stake, and described circulation work progress is identical with step a;
H, upright pile body fabrication of reinforcing cage are installed: pile body reinforcing cage adopts usual manner to weld outside stake hole, pile body stirrup is encrypted at the horizontal haunched beam of dorsal part and the upper and lower 2.0m scope of the horizontal haunched beam joint of face side, after completing, adopt crane that reinforcing bar cage hoisting is fixed to the stake hole of excavation, and in the horizontal haunched beam of dorsal part, the horizontal haunched beam of face side and pile body joint, horizontal dorsal part haunched beam, the horizontal haunch beam main tendon of face side and the main muscle of pile body are welded, and described reinforcing cage welding manner is identical with step c;
I, the upright pile body of antislide pile, the horizontal haunched beam of dorsal part and the horizontal haunched beam concreting of face side: adopt pumping of concrete to build the upright pile body of antislide pile, the horizontal haunched beam of dorsal part and the horizontal haunched beam of face side, every continous pouring 0.5～0.7m in casting process, adopt immersion vibrator vibration compacting 1 time, the distance of immersion vibrator tumbling barrel or conduit end opening and concreting face should be controlled between 1.0～3.0m.
The technological merit of a kind of Z-shaped of the present invention square-section antislide pile and construction method thereof is as follows:
(1) be subject to the spatial distribution characteristic of force mode and bending and shearing in conjunction with antislide pile, give full play to after stake and gravity pressure, the anti-pressure ability of good ground and the anti-skid function of the load-bearing of horizontal haunched beam of the front Rock And Soil of stake, effectively improve pile body and be subject to force intensity, improved bending resistance and the shear resistance of antislide pile.
(2) simple, the anti-skid performance of anti-slide pile structure form strong, be easy to construction, be both applicable to high gradient slope or foundation pit supporting project, be also applicable to major landslip and administer engineering.
(3) citation form adopts the construction method of hand excavated pile, has inherited its advantage, has the advantages such as bending resistance and shear resistance are strong, construction technology is simple, reliability is high, cost is low.
Brief description of the drawings
Fig. 1 is the layout schematic diagram of a kind of Z-shaped of the present invention square-section antislide pile in slope support engineering.
Fig. 2 is the layout schematic diagram of a kind of Z-shaped of the present invention square-section antislide pile in landslide control engineering.
Fig. 3 is the cross-sectional view of a kind of Z-shaped of the present invention square-section antislide pile.
Fig. 4 is the plan structure schematic diagram of a kind of Z-shaped of the present invention square-section antislide pile.
Fig. 5 is the shearing distribution schematic diagram of a kind of Z-shaped of the present invention square-section antislide pile operating principle.
Fig. 6 is the Bending moment distribution schematic diagram of a kind of Z-shaped of the present invention square-section antislide pile operating principle.
In Fig. 7, a, b, c, d, e, f, g, h, i are the construction technology process schematic diagram of a kind of Z-shaped of the present invention square-section anti-slide pile construction method.
In figure: the upright pile body of 1-, the horizontal haunched beam of 2-dorsal part, 3-dorsal part tiltedly holds in the palm, the horizontal haunched beam of 4-face side, the holder of 5-face skew back, Rock And Soil after 6-stake, 7-Side Slope crack face, the 8-slide surface that comes down, 9-good ground, H
1-upright pile body depth of section, H
2the horizontal haunched beam depth of section of-dorsal part, H
3-dorsal part tiltedly holds in the palm height, H
4the horizontal haunched beam depth of section of-face side, H
5-face skew back holder height, B
1-upright pile body breadth of section, B
2the horizontal haunched beam breadth of section of-dorsal part, B
3-dorsal part tiltedly holds in the palm width, B
4the horizontal haunched beam breadth of section of-face side, B
5-face skew back holder width, I
1the horizontal haunched beam of-dorsal part is apart from the distance of Side Slope crack face or landslide slide surface and upright pile body dorsal part intersection point, I
2the horizontal haunched beam of-dorsal part passes through Side Slope crack face or landslide slide surface extend into the degree of depth in good ground, I
3the horizontal haunched beam of-face side is apart from the distance of Side Slope crack face or landslide slide surface and upright pile body face top-cross point, I
4the length of the horizontal haunched beam of-face side.
Detailed description of the invention
Shown in root Ju Fig. 1, Fig. 2, Fig. 3, Fig. 4, a kind of Z-shaped square-section antislide pile, comprising: upright pile body 1, the horizontal haunched beam 2 of dorsal part and the horizontal haunched beam 4 of face side; The horizontal haunched beam 2 of dorsal part is arranged on upright pile body 1 dorsal part, and the horizontal haunched beam 4 of face side is arranged on 1 side of upright pile body.
Also comprise tiltedly holder 3 of dorsal part, horizontal haunched beam 2 upsides of described dorsal part are connected with uprightly pile body 1 is vertical, and horizontal haunched beam 2 downsides of dorsal part are connected by the oblique holder 3 of dorsal part with upright pile body 1.
Also comprise face skew back holder 5, horizontal haunched beam 4 downsides of described face side are connected with uprightly pile body 1 is vertical, and horizontal haunched beam 4 upsides of face side are connected by face skew back holder 5 with upright pile body 1.
The horizontal haunched beam 2 of described dorsal part is arranged on upright pile body 1 dorsal part, apart from the above distance I of intersection point of Side Slope crack face 7 or landslide slide surface 8 and upright pile body 1 dorsal part
1be not less than 3.0m; The horizontal haunched beam 2 of described dorsal part passes through Side Slope crack face 7 or landslide slide surface 8 extend into the degree of depth I in good ground 9
2be not less than 2.0m.
The horizontal haunched beam 4 of described face side is arranged on 1 side of upright pile body, apart from the following distance I of intersection point of Side Slope crack face 7 or landslide slide surface 8 and upright 1 side of pile body
3be not less than 3.0m.
Horizontal haunched beam 4 cross sectional shapes of the horizontal haunched beam 2 of described upright pile body 1, dorsal part and face side are rectangle, and sectional dimension is identical, upright pile body 1 breadth of section B
1the horizontal haunched beam 2 breadth of section B of=dorsal part
2the horizontal haunched beam 4 breadth of section B of=face side
4=2.0 ~ 3.0m, upright pile body 1 depth of section H
1the horizontal haunched beam 2 depth of section H of=dorsal part
2the horizontal haunched beam 4 depth of section H of=face side
4=2.0 ~ 3.0m.
The horizontal haunched beam 4 length I of described face side
4be not less than the upright pile body 1 breadth of section B of 2 times
1.
Described dorsal part is holder 3 width B tiltedly
3and height H
3be 1.0 ~ 2.0m.
Described face skew back holder 5 width B
5and height H
5be 1.0 ~ 2.0m.
Described upright pile body 1 is built by steel concrete.
Root Ju Fig. 5, shown in Fig. 6, the operating principle of a kind of Z-shaped of the present invention square-section antislide pile is: upright pile body dorsal part arrange respectively with face side certain depth place together with horizontal haunched beam, and horizontal dorsal part haunched beam 2 is passed through to potential slide surface extend in good ground, horizontal face side haunched beam 4 is placed in the good ground below potential slide surface, when antislide pile work, the gravity pressure that the horizontal haunched beam 2 of dorsal part provides by Rock And Soil after stake 6, give full play to the anti-skid function of its load-bearing, Thrust of Landslide or side slope soil pressure that upright pile body 1 is born are effectively reduced, when the horizontal haunched beam 2 of dorsal part and upright pile body 1 cooperative bearing, after stake, Rock And Soil 6 can be in an opposing moment of flexure contrary with Thrust of Landslide or side slope soil pressure action moment of the horizontal haunched beam 2 upsides generations of dorsal part, when the horizontal haunched beam 4 of face side and upright pile body 1 cooperative bearing, good ground 9 can produce an opposing moment of flexure contrary with Thrust of Landslide or side slope soil pressure action moment at horizontal haunched beam 4 downsides of face side, the horizontal haunched beam 2 of dorsal part and the horizontal haunched beam 4 of face side self are also shared Partial Shear simultaneously, thereby bending resistance and the shear resistance of antislide pile are improved, antislide pile fixed section length, sectional dimension and quantity of reinforcement are reduced, reduce construction costs, utilize the gravity pressure of the front Rock And Soil of stake, the overall structure that the anti-pressure ability of good ground and the back of the body, the horizontal haunched beam of face side and pile body form, effectively improve pile body and be subject to force intensity, improve bending resistance and the shear resistance of antislide pile, strengthened the regulation effect of antislide pile.
As shown in Figure 7, a kind of Z-shaped square-section anti-slide pile construction method, concrete steps are as follows:
A, the horizontal haunched beam epimere of dorsal part pile body pore-forming: adopt artificial vertical digging mode pore-forming, in pore forming process, one section of every excavation is built one section of steel concrete retaining wall, and circulation is constructed to the oblique backing face of dorsal part design elevation;
Described circulation construction sequence is as follows: every section of vertical cut degree of depth should be controlled between 0.5 ~ 1.0m, and breast wall concrete adopts C25 concrete, and thickness is not less than 20cm, after the preceding paragraph panelling construction completes, can carry out next section of excavation;
B, the horizontal haunched beam Liang Shen of dorsal part cavern pore-forming: adopt artificial horizontal digging mode pore-forming, in pore forming process, one section of every excavation adopts one section of the mode lining cutting such as anchor pole, spray concrete, and circulation construction is not less than 2.0m to stretching into Side Slope crack face or the landslide slide surface degree of depth;
Described circulation construction sequence is as follows: every section of horizontal cutting depth should be controlled between 1.0 ~ 2.0m, lining cutting mode is adjusted flexibly according to driving stratum characteristic, in soft rock or scall, adopt spray concrete and combining anchor to carry out lining cutting, in other stratum, adopt spray concrete to carry out lining cutting, after the preceding paragraph lining construction completes, can carry out next section of excavation;
C, the horizontal haunched beam fabrication of reinforcing cage of dorsal part are installed: reinforcing bar adopts usual manner to weld in Liang Shen cavern, reinforcing cage is from the progressively fabrication and installation toward hole of cavern's face, in fabrication and installation process, horizontal haunch beam main tendon should stretch out hole and is not less than 35 times of main muscle diameter lengths, and be bent in cavern, so that the horizontal haunch beam main tendon of later stage dorsal part and the main muscle of pile body weld, do not affect pile body pore-forming and reinforcing cage construction simultaneously;
Described welding step is as follows: between the main muscle of beam body and stirrup, adopt quincunx spot welding, between main muscle and main muscle, adopt overlap welding, fusion length is not less than 10 times of main muscle diameters;
Section pile body pore-forming between d, the horizontal haunched beam of dorsal part and the horizontal haunched beam of face side: adopt artificial vertical digging mode pore-forming, in pore forming process, one section of every excavation is built one section of steel concrete retaining wall, circulation is constructed to the horizontal haunched beam of face side bottom surface design elevation, and described circulation form of construction work is identical with step a;
E, the horizontal haunched beam Liang Shen of face side cavern pore-forming: adopt artificial horizontal digging mode pore-forming, in pore forming process, one section of every excavation adopts one section of the mode lining cutting such as anchor pole, spray concrete, circulation construction, the horizontal haunched beam Liang Shen of face side cavern length is not less than the upright pile body breadth of section of 2 times, and described circulation form of construction work is identical with step b;
F, the horizontal haunched beam fabrication of reinforcing cage of face side are installed: reinforcing bar adopts usual manner to weld in Liang Shen cavern, reinforcing cage is from the progressively fabrication and installation toward hole of cavern's face, in fabrication and installation process, horizontal haunch beam main tendon should stretch out hole and is not less than 35 times of main muscle diameter lengths, and be bent in cavern, so that the horizontal haunch beam main tendon of later stage face side and the main muscle of pile body weld, do not affect pile body pore-forming and reinforcing cage construction, described reinforcing cage welding manner is identical with step c simultaneously;
G, the horizontal haunched beam hypomere of face side pile body pore-forming: adopt artificial vertical digging mode pore-forming, in pore forming process, one section of every excavation is built one section of steel concrete retaining wall, circulation is constructed to design elevation at the bottom of antislide pile stake, and described circulation work progress is identical with step a;
H, upright pile body fabrication of reinforcing cage are installed: pile body reinforcing cage adopts usual manner to weld outside stake hole, pile body stirrup is encrypted at the horizontal haunched beam of dorsal part and the upper and lower 2.0m scope of the horizontal haunched beam joint of face side, after completing, adopt crane that reinforcing bar cage hoisting is fixed to the stake hole of excavation, and in the horizontal haunched beam of dorsal part, the horizontal haunched beam of face side and pile body joint, horizontal dorsal part haunched beam, the horizontal haunch beam main tendon of face side and the main muscle of pile body are welded, and described reinforcing cage welding manner is identical with step c;
I, the upright pile body of antislide pile, the horizontal haunched beam of dorsal part and the horizontal haunched beam concreting of face side: adopt pumping of concrete to build the upright pile body of antislide pile, the horizontal haunched beam of dorsal part and the horizontal haunched beam of face side, and carry out maintenance, every continous pouring 0.5～0.7m in casting process, adopt immersion vibrator vibration compacting 1 time, the distance of immersion vibrator tumbling barrel or conduit end opening and concreting face should be controlled between 1.0～3.0m.
Claims (10)
1. a Z-shaped square-section antislide pile, is characterized in that: comprising: upright pile body (1), the horizontal haunched beam of dorsal part (2) and the horizontal haunched beam of face side (4); The horizontal haunched beam of dorsal part (2) is arranged on upright pile body (1) dorsal part, and the horizontal haunched beam of face side (4) is arranged on upright pile body (1) face side.
2. a kind of Z-shaped according to claim 1 square-section antislide pile, it is characterized in that: also comprise that dorsal part tiltedly holds in the palm (3), the horizontal haunched beam of described dorsal part (2) upside and upright vertical connection of pile body (1), the horizontal haunched beam of dorsal part (2) downside tiltedly asks (3) to be connected with upright pile body (1) by dorsal part.
3. a kind of Z-shaped according to claim 1 and 2 square-section antislide pile, it is characterized in that: also comprise face skew back holder (5), the described horizontal haunched beam of face side (4) downside and upright vertical connection of pile body (1), the horizontal haunched beam of face side (4) upside is connected by face skew back holder (5) with upright pile body (1).
4. a kind of Z-shaped according to claim 1 square-section antislide pile, it is characterized in that: the horizontal haunched beam of described dorsal part (2) is arranged on upright pile body (1) dorsal part, apart from the above distance I of intersection point of Side Slope crack face (7) or landslide slide surface (8) and upright pile body (1) dorsal part
1be not less than 3.0m; The horizontal haunched beam of described dorsal part (2) passes through Side Slope crack face (7) or landslide slide surface (8) extend into the degree of depth I in good ground (9)
2be not less than 2.0m.
5. a kind of Z-shaped according to claim 1 square-section antislide pile, it is characterized in that: the described horizontal haunched beam of face side (4) is arranged on upright pile body (1) face side, apart from the following distance I of intersection point of Side Slope crack face (7) or landslide slide surface (8) and upright pile body (1) face side
3be not less than 3.0m.
6. a kind of Z-shaped according to claim 1 square-section antislide pile, it is characterized in that: described upright pile body (1), the horizontal haunched beam of dorsal part (2) and the horizontal haunched beam of face side (4) cross sectional shape are rectangle, and sectional dimension is identical, upright pile body (1) breadth of section B
1the horizontal haunched beam of=dorsal part (2) breadth of section B
2the horizontal haunched beam of=face side (4) breadth of section B
4=2.0 ~ 3.0m, upright pile body (1) depth of section H
1the horizontal haunched beam of=dorsal part (2) depth of section H
2the horizontal haunched beam of=face side (4) depth of section H
4=2.0 ~ 3.0m.
7. a kind of Z-shaped according to claim 1 square-section antislide pile, is characterized in that: the described horizontal haunched beam of face side (4) length I
4be not less than upright pile body (1) the breadth of section B of 2 times
1.
8. a kind of Z-shaped according to claim 2 square-section antislide pile, is characterized in that: described dorsal part tiltedly holds in the palm (3) width B
3and height H
3be 1.0 ~ 2.0m.
9. a kind of Z-shaped according to claim 3 square-section antislide pile, is characterized in that: described face skew back holder (5) width B
5and height H
5be 1.0 ~ 2.0m.
10. a Z-shaped square-section anti-slide pile construction method, concrete steps are as follows:
A, the horizontal haunched beam epimere of dorsal part pile body pore-forming: adopt artificial vertical digging mode pore-forming, in pore forming process, one section of every excavation is built one section of steel concrete retaining wall, and circulation is constructed to the oblique backing face of dorsal part design elevation;
Described circulation construction sequence is as follows: every section of vertical cut severity control is between 0.5 ~ 1.0m, and breast wall concrete adopts C25 concrete, and thickness is not less than 20cm, after the preceding paragraph panelling construction completes, can carry out next section of excavation;
B, the horizontal haunched beam Liang Shen of dorsal part cavern pore-forming: adopt artificial horizontal digging mode pore-forming, in pore forming process, one section of every excavation adopts one section of the mode lining cutting such as anchor pole, spray concrete, and circulation construction is not less than 2.0m to stretching into Side Slope crack face or the landslide slide surface degree of depth;
Described circulation construction sequence is as follows: every section of horizontal cutting depth is controlled between 1.0 ~ 2.0m, lining cutting mode is adjusted flexibly according to driving stratum characteristic, in soft rock or scall, adopt spray concrete and combining anchor to carry out lining cutting, in other stratum, adopt spray concrete to carry out lining cutting, after the preceding paragraph lining construction completes, can carry out next section of excavation;
C, the horizontal haunched beam fabrication of reinforcing cage of dorsal part are installed: reinforcing bar adopts usual manner to weld in Liang Shen cavern, reinforcing cage is from the progressively fabrication and installation toward hole of cavern's face, in fabrication and installation process, horizontal haunch beam main tendon should stretch out hole and is not less than 35 times of main muscle diameter lengths, and is bent in cavern;
Described welding step is as follows: between the main muscle of beam body and stirrup, adopt quincunx spot welding, between main muscle and main muscle, adopt overlap welding, fusion length is not less than 10 times of main muscle diameters;
Section pile body pore-forming between d, the horizontal haunched beam of dorsal part and the horizontal haunched beam of face side: adopt artificial vertical digging mode pore-forming, in pore forming process, one section of every excavation is built one section of steel concrete retaining wall, circulation is constructed to the horizontal haunched beam of face side bottom surface design elevation, and described circulation form of construction work is identical with step a;
E, the horizontal haunched beam Liang Shen of face side cavern pore-forming: adopt artificial horizontal digging mode pore-forming, in pore forming process, one section of every excavation adopts one section of the mode lining cutting such as anchor pole, spray concrete, circulation construction, the horizontal haunched beam Liang Shen of face side cavern length is not less than the upright pile body breadth of section of 2 times, and described circulation form of construction work is identical with step b;
F, the horizontal haunched beam fabrication of reinforcing cage of face side are installed: reinforcing bar adopts usual manner to weld in Liang Shen cavern, reinforcing cage is from the progressively fabrication and installation toward hole of cavern's face, in fabrication and installation process, horizontal haunch beam main tendon should stretch out hole and is not less than 35 times of main muscle diameter lengths, and be bent in cavern, so that the horizontal haunch beam main tendon of later stage face side and the main muscle of pile body weld, do not affect pile body pore-forming and reinforcing cage construction, described reinforcing cage welding manner is identical with step c simultaneously;
G, the horizontal haunched beam hypomere of face side pile body pore-forming: adopt artificial vertical digging mode pore-forming, in pore forming process, one section of every excavation is built one section of steel concrete retaining wall, circulation is constructed to design elevation at the bottom of antislide pile stake, and described circulation work progress is identical with step a;
H, upright pile body fabrication of reinforcing cage are installed: pile body reinforcing cage adopts usual manner to weld outside stake hole, pile body stirrup is encrypted at the horizontal haunched beam of dorsal part and the upper and lower 2.0m scope of the horizontal haunched beam joint of face side, after completing, adopt crane that reinforcing bar cage hoisting is fixed to the stake hole of excavation, and in the horizontal haunched beam of dorsal part, the horizontal haunched beam of face side and pile body joint, horizontal dorsal part haunched beam, the horizontal haunch beam main tendon of face side and the main muscle of pile body are welded, and described reinforcing cage welding manner is identical with step c;
I, the upright pile body of antislide pile, the horizontal haunched beam of dorsal part and the horizontal haunched beam concreting of face side: adopt pumping of concrete to build the upright pile body of antislide pile, the horizontal haunched beam of dorsal part and the horizontal haunched beam of face side, every continous pouring 0.5～0.7m in casting process, adopt immersion vibrator vibration compacting 1 time, the distance of immersion vibrator tumbling barrel or conduit end opening and concreting face is controlled between 1.0～3.0m.
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| CN114960695B (en) * | 2021-03-25 | 2024-05-28 | 三峡大学 | Spreading arm type drainage slide-resistant pile |
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