CN209854709U - Pressure-grouting cement soil static pressure pipe pile structure - Google Patents
Pressure-grouting cement soil static pressure pipe pile structure Download PDFInfo
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- CN209854709U CN209854709U CN201920056243.5U CN201920056243U CN209854709U CN 209854709 U CN209854709 U CN 209854709U CN 201920056243 U CN201920056243 U CN 201920056243U CN 209854709 U CN209854709 U CN 209854709U
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Abstract
The utility model provides a pressure is irritated soil cement static pressure tubular pile structure, belongs to building foundation structure technical field for improve pile body intensity, vertical bearing capacity, bending resistance, tensile and shear strength, thereby improve and consolidate the ground ability. The technical scheme is as follows: the tubular pile is placed perpendicularly, and the locator is steel bar welded's frame, and the locator encircles in the tubular pile bottom, locator and tubular pile outer wall welded connection, and the soil cement stake is encircleed in the tubular pile periphery, and the diameter of soil cement stake is more than one time of tubular pile diameter. The utility model provides a various bearing pile itself and the not enough of construction in the current ground is handled, pressure irrigation cement static pressure tubular pile structure and construction method can improve pile body intensity and vertical bearing capacity effectively, have higher bending resistance, tensile and shear strength to improve the reinforcement ground ability greatly, can adapt to the ground of multiple geological conditions and handle the requirement, convenient construction simultaneously, can reduce cost effectively, satisfy the environmental protection requirement, have extensive using value widely.
Description
Technical Field
The utility model relates to a tubular pile structure of building foundation belongs to building foundation technical field.
Background
At present, with the implementation of a large number of various basic construction projects and industrial projects, foundation construction under various geological conditions becomes a normal state of the construction industry. The different geological conditions and constraints of the ground environment, as well as the design of the building models, present new challenges for the foundation treatment. The foundation treatment methods commonly used at present are as follows: cement-soil mixing piles, rammed cement-soil piles, lime-soil compaction piles, precast tubular piles, cement fly ash gravel piles (CFG) and the like.
The cement-soil mixing pile, the rammed cement-soil pile and the lime-soil compaction pile are simple in construction and low in manufacturing cost, but the pile body strength is low, the capability of improving the bearing capacity of the foundation is limited, the shear force cannot be borne, and large deformation and damage are easy to generate.
The cement fly ash gravel pile is formed by mixing cement, fly ash, gravel, stone chips or sand with water, and forms a composite foundation together with soil between piles and a mattress layer. However, the pile forming quality is not easy to control, quality problems such as pile deflection, hole channeling, necking, pile body mud adding, pile breaking and the like are easy to occur, the pile is greatly influenced by construction machinery, the situations of pipe blockage, difficult drilling and the like often occur, and the horizontal resistance of the pile body is lower because the pile body is not provided with the reinforcement.
The vertical bearing capacity of the prestressed pipe pile is very high, the pile body quality is easy to guarantee because the prestressed pipe pile is prefabricated in a factory, and compared with a cast-in-situ bored pile, consumed reinforcing steel bars and concrete are greatly saved. Because the pile body is provided with the steel bars, the horizontal resistance of the pile body is stronger. Construction can be carried out in heavy pollution weather, and the construction period is guaranteed. The construction method of the pipe pile is generally static pressure method or hammering method, and is suitable for soft soil layer. When the geological conditions such as hard soil, thick-layer sandy soil, filling soil and the like are met, pile sinking is difficult, construction can be performed by means of hole guiding, the requirement on construction machinery is high, and meanwhile, certain influence is caused on bearing capacity.
Because the existing common foundation treatment methods have respective defects, it is necessary to design a bearing pile with higher strength and bearing capacity, convenient construction and low cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a pressure irrigation cement soil static pressure tubular pile structure is provided, this kind of pressure irrigation cement soil static pressure tubular pile structure can improve pile body intensity and vertical bearing capacity effectively, has higher bending resistance, tensile and shear strength to improve greatly and consolidate the ground ability, simultaneously, have convenient construction, reduce cost's advantage.
The technical scheme for solving the technical problems is as follows:
the utility model provides a pressure irrigation soil cement static pressure tubular pile structure, it includes pressure irrigation soil cement stake, tubular pile, locator, the tubular pile is placed perpendicularly, the locator is reinforcement welded frame, the locator encircles in the tubular pile bottom, locator and tubular pile outer wall welded connection, soil cement stake is around tubular pile periphery, the diameter of soil cement stake is greater than tubular pile diameter more than 300 mm.
Above-mentioned pressure is irritated soil cement static pressure tubular pile structure, the tubular pile is prefabricated tubular pile, and the cross-section of tubular pile is circular.
Above-mentioned pressure irrigation soil cement static pressure tubular pile structure, the locator comprises two ring planes and a plurality of pull rod, parallel coaxial placing about two ring planes, two planar outer circumferences of ring have many vertically reinforcing bar pull rod to connect, every ring plane is by an outer ring, an interior ring and a regular triangle form, outer ring and the coaxial placing of inner ring, interior ring is regular triangle's inscribed circle, regular triangle's summit and outer ring welded connection, regular triangle crisscross placing in two ring planes, two regular triangle's projection on the horizontal plane is regular hexagon, the diameter of two outer rings is the same with the external diameter of soil cement pile, the diameter of two interior rings and the external diameter phase-match of tubular pile, the outer wall end board and two interior ring welded connection of tubular pile.
The utility model has the advantages that:
the utility model discloses increased the tubular pile in the cement soil stake, the tubular pile is fixed a position by locator control, and various bearing pile that use with current ground processing have following advantage compared:
(1) the bearing capacity is high: the size of the pile is increased by 4-5 times compared with that of a common cement soil pile and is increased by 20-30% compared with that of a tubular pile;
(2) pile body intensity is high: the prefabricated pipe pile is arranged in the pile body, so that the pile forming quality is easy to control, and the tensile strength, the bending strength and the shear strength of the pile body are increased;
(3) the construction is convenient: the construction can be completed by using conventional machinery without special machinery, and the operation is simple and convenient;
(4) saving materials: compared with the traditional CFG pile, the pile length can be shortened, the pile distance can be increased and the material can be saved due to the improvement of the bearing capacity;
(5) and (3) environmental protection: the cement slurry is prepared by drilling and unearthing, the slag and soil are hardly consumed, the pipe pile is prefabricated, the environment is not polluted, the construction can be carried out in heavily polluted weather, and the construction period is guaranteed.
The utility model discloses a not enough of various bearing piles of foundation construction treatment itself and construction has been solved to the initiative in the foundation construction ground treatment field. The utility model discloses a pressure irrigation cement soil static pressure tubular pile structure can improve pile body intensity and vertical bearing capacity effectively, has higher bending resistance, tensile and shear strength to improve greatly and consolidate the ground ability, can adapt to the ground processing requirement of multiple geological conditions, convenient construction simultaneously, can reduce cost effectively, satisfy the environmental protection requirement, have extensive using value widely in industry.
Drawings
FIG. 1 is a schematic structural view of the pressure-grouting soil cement static pressure pipe pile of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic view of a positioner;
FIG. 4 is a process flow chart of the construction method of the present invention.
The figures are labeled as follows: the concrete pile comprises a cement soil pile 1, a tubular pile 2, a positioner 3, an outer circular ring 4, an inner circular ring 5, a steel bar pull rod 6 and a regular triangle 7.
Detailed Description
The utility model discloses a pressure irrigation soil cement static pressure tubular pile comprises soil cement stake 1, tubular pile 2, locator 3.
Fig. 1 and 2 show that the outside of pressure-grouting soil cement static pressure pipe pile is soil cement pile 1, pipe pile 2 is located soil cement pile 1, and is as an organic whole with soil cement pile 1 pouring, and locator 3 encircles in 2 bottoms of pipe pile, locator 3 and 2 outer wall welded connections of pipe pile.
The cement soil pile 1 is composed of water, cement, soil and an additive, wherein the mass ratio of the water to the cement to the soil is 0.45 to 0.2 to 1, the soil is selected from on-site soil which does not contain garbage and humus, and the additive can be added according to the workability of the cement soil and the construction requirements, such as a micro-expansion agent, a retarding water reducer, cellulose, fly ash and the like.
The tubular pile 2 is a circular section, the specific surface area of the tubular pile is the largest, and the side friction resistance is the largest. The diameter of the cement soil pile 1 is larger than that of the pipe pile 2 by more than 3000mm so as to ensure that the cement soil can provide pile side friction resistance, and the condition of the damage of the cement soil and the section of the pipe pile does not occur.
Peripheral soil cement stake 1 flushes in precast tubular pile 2 to guarantee that soil cement 1 and tubular pile 2 bear the load jointly, guarantee pile body overall quality, protect the pile body when also being favorable to the later stage construction.
Fig. 2 and 3 show that the outer diameter of the positioner 3 is tightly attached to the side wall of the pile hole, the inner diameter of the positioner is welded with the precast tubular pile 2, and the height of the positioner 3 is consistent with that of the end plate of the tubular pile 2.
The positioner 3 comprises two circular planes and a plurality of pull rods 6, the two circular planes are arranged coaxially in parallel from top to bottom, and the outer circumferences of the two circular planes are connected by a plurality of vertical steel bar pull rods 6. Each circular ring plane is composed of an outer circular ring 4, an inner circular ring 5 and a regular triangle 7, the outer circular ring 4 and the inner circular ring 5 are coaxially arranged, the inner circular ring 5 is connected with an inscribed circle of the regular triangle 7 in a welding mode, and the vertex of the regular triangle 7 is connected with the outer circular ring 4 in a welding mode.
Regular triangles 7 in the planes of the two circular rings are staggered, and the projections of the two regular triangles 7 on the horizontal plane are regular hexagons.
The diameter of two outer rings 4 is the same with soil cement pile 1's external diameter, and the diameter of two inner ring 5 and the external diameter phase-match of tubular pile 2, the outer wall and two inner ring 5 welded connection of tubular pile 2.
The utility model discloses a construction method, it adopts following step to go on:
a. preparation before construction: firstly, measuring a paying-off pile position, then positioning by using a long spiral drilling machine, drilling after the drilling machine is in place, wherein the drilling depth and the bore diameter are strictly executed according to the design requirements of pressure-grouting cement static pressure pipe piles, and the soil dug out by hole forming needs to be protected so as to prepare cement soil slurry;
b. preparing cement soil slurry according to a ratio, wherein water: cement: soil =0.45:0.2:1 (mass ratio), additives can be added according to the workability of cement soil and construction requirements, such as micro-expanding agent, retarding and water reducing agent, fly ash and the like, a stirring machine is adopted to stir on site, and the stirring amount of the cement soil meets the pile forming requirement;
c. preparing a tubular pile 2 according to design requirements;
d. manufacturing a positioner 3 on site, matching the diameter of an outer circular ring 4 of the positioner 3 with the diameter of a drilled hole, matching the diameter of an inner circular ring 5 of the positioner 3 with the outer diameter of the tubular pile 2, and welding the positioner 3 and the tubular pile 2;
e. pouring cement soil, and pressure-pouring the mixed cement soil into the drill hole without interruption in the pouring process, wherein the pressure-pouring amount is the sum of the pore-forming volume and the tubular pile volume, and the pouring amount is increased in consideration of the condition that the cement soil is suitable for the soil quality on site due to loss;
f. installing the tubular pile 2 and the positioner 3, vertically inserting the connected tubular pile 2 and the positioner 3 into the cement soil by using a crane before the cement soil is solidified, and slowly sinking the positioner 3 by contacting the periphery of the positioner 3 with the wall of a hole in the sinking process, wherein the pile top can be sunk under the assistance of a vibrator if the sinking is difficult;
g. and (3) maintaining the pile body for not less than 21 days, cutting off the cement soil pile of the protection part after the pile body meets the strength requirement, cleaning the field, and performing a detection test.
The utility model discloses an embodiment as follows:
when a certain project is constructed by adopting the method, the characteristic value of the vertical compression-resistant bearing capacity of the single pile is required to be more than or equal to 1300 kN. The diameter of the cement soil pile 1 is 800mm, the diameter of the pipe pile 2 is 500mm, and the pile length is 21 m.
The construction method comprises the following steps:
the cement doping amount of the cement soil pile 1 is 20%, namely site sand soil, 20% of cement, bentonite in a certain proportion, and water: cement: soil =0.45:0.2:1 (mass ratio).
Drilling a hole by a long spiral drilling machine (model CFG30-800mm), connecting a ground pump by a feed delivery pipe in a drill rod, and pressing and pouring the cement-soil mixture which is mixed in advance into the hole.
The prestressed pipe pile 2 adopts PHC500AB100-10,9, is selected from prestressed concrete pipe piles in the national standard drawing set, the impermeability grade of the pile body concrete is not lower than P10, and is doped with an anticorrosive rust inhibitor, the thickness of the reinforcing steel bar protective layer is not less than 35mm, the pile is pressed by a static pressure pipe pile machine, and the welding of the pipe pile joint is carried out according to the relevant specifications.
Locator 3 is formed by HRB400 steel bar welding, and the reinforcing bar diameter is 20mm, and 3 high 200mm of locator, the interior ring diameter of locator 3 is 500mm, and the outer ring diameter is 800 mm.
Claims (3)
1. The utility model provides a pressure irrigation soil cement static pressure tubular pile structure which characterized in that: it is including pressure irrigation soil cement stake (1), tubular pile (2), locator (3), and tubular pile (2) are placed perpendicularly, and locator (3) are reinforcement welded frame, and locator (3) encircle in tubular pile (2) bottom, and locator (3) and tubular pile (2) outer wall welded connection, and soil cement stake (1) encircle in tubular pile (2) periphery, and the diameter of soil cement stake (1) is greater than tubular pile (2) diameter more than 300 mm.
2. The pressure grouting cement soil static pressure pipe pile structure according to claim 1, characterized in that: the tubular pile (2) is a prefabricated tubular pile, and the section of the tubular pile (2) is circular.
3. The pressure grouting cement soil static pressure pipe pile structure according to claim 1, characterized in that: the locator (3) comprises two ring planes and a plurality of pull rods (6), the two ring planes are coaxially placed in parallel from top to bottom, the outer circumferences of the two ring planes are connected by a plurality of vertical pull rods (6), each ring plane is composed of an outer ring (4), an inner ring (5) and a regular triangle (7), the outer ring (4) and the inner ring (5) are coaxially placed, the inner ring (5) is welded and connected with the inscribed circle of the regular triangle (7), the top point of the regular triangle (7) is welded and connected with the outer ring (4), the regular triangles (7) in the two ring planes are staggered and placed, the projections of the two regular triangles (7) on the horizontal plane are regular hexagons, the diameters of the two outer rings (4) are the same as the outer diameter of the cement soil pile (1), the diameters of the two inner rings (5) are matched with the outer diameter of the tubular pile (2), the outer wall of the tubular pile (2) is connected with the two inner circular rings (5) in a welding way.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920056243.5U CN209854709U (en) | 2019-01-14 | 2019-01-14 | Pressure-grouting cement soil static pressure pipe pile structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920056243.5U CN209854709U (en) | 2019-01-14 | 2019-01-14 | Pressure-grouting cement soil static pressure pipe pile structure |
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| CN209854709U true CN209854709U (en) | 2019-12-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736303A (en) * | 2019-01-14 | 2019-05-10 | 中国兵器工业北方勘察设计研究院有限公司 | It is a kind of to press pour water soil static pressure pipe pile structure and construction method |
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2019
- 2019-01-14 CN CN201920056243.5U patent/CN209854709U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736303A (en) * | 2019-01-14 | 2019-05-10 | 中国兵器工业北方勘察设计研究院有限公司 | It is a kind of to press pour water soil static pressure pipe pile structure and construction method |
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