CN114541373A - Construction method of concrete pile - Google Patents
Construction method of concrete pile Download PDFInfo
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- CN114541373A CN114541373A CN202111289957.9A CN202111289957A CN114541373A CN 114541373 A CN114541373 A CN 114541373A CN 202111289957 A CN202111289957 A CN 202111289957A CN 114541373 A CN114541373 A CN 114541373A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/48—Piles varying in construction along their length, i.e. along the body between head and shoe, e.g. made of different materials along their length
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/50—Piles comprising both precast concrete portions and concrete portions cast in situ
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
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Abstract
The invention provides a concrete pile construction method, which utilizes the technical characteristic that the pile end is filled with fillers to be compacted so as to improve the bearing capacity, can use various devices and be compatible with various materials in the construction process, is particularly suitable for the engineering requirements of low underground water content and hard soil, and comprises the following steps: 1) the pile casing can be sunk to a set depth by adopting various modes, or holes are directly formed in the soil body; 2) filling coarse aggregate in batches and tamping or extruding the coarse aggregate in a hammering or static pressure mode; 3) filling a set amount of coarse aggregate and tamping or extruding the coarse aggregate; 4) filling fine aggregate in batches and tamping or extruding the fine aggregate by using a hammering or static pressure mode; 5) filling a set amount of fine aggregate and tamping or extruding the fine aggregate to reinforce and compact the soil body below the pile end within a certain depth and range; 6) and (4) constructing the cast-in-place concrete pile body or the precast concrete pile body according to geological conditions and design requirements.
Description
Technical Field
The invention relates to a pile foundation construction technology, in particular to a concrete pile construction method.
Background
Patent No. ZL98101041.5 discloses a pile foundation technology, which includes a composite carrier and a concrete pile body, and is characterized in that a pile casing is filled with fillers such as construction waste, the fillers are rammed by a heavy hammer, and the composite carrier is formed at the pile end by a three-stroke penetration control standard, so that the upper load is effectively transmitted to a better bearing layer through the pile and the composite carrier under the pile, thereby improving the bearing capacity of the pile. However, the filling material adopted by the technology is the construction waste, firstly, the material is single, other nearby materials cannot be fully utilized, secondly, the clay brick is less and less used along with the development of construction, the cost is increased due to the fact that the construction waste is difficult to find, and thirdly, the secondary pollution of the construction waste is easily caused.
In addition, in the northwest broad area of China, because the regional characteristics of the high-rise and super-high-rise buildings are fewer compared with the coastal areas, the requirement on the bearing capacity of the pile foundation is generally lower, and compared with the coastal areas, the geological conditions of the northwest area have less underground water content and relatively harder soil quality. Meanwhile, the concentration and the specificity of construction equipment in northwest regions are not high, the technological level of the construction equipment is relatively low, the construction equipment mainly has diversity and old types, and the construction equipment is scientifically and effectively utilized. In addition, the types of various construction materials in northwest regions are abundant, and the materials should be better utilized comprehensively.
It is therefore desirable to provide a pile which meets the requirements of foundation bearing capacity, is suitable for local geological conditions, can be constructed with the same quality by using a plurality of devices and compatible with a plurality of materials, and has high working efficiency and low cost.
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a method for constructing a concrete pile, which makes full use of the technical characteristic of improving bearing capacity by packing at the pile end, can use various equipments and be compatible with various materials in the construction process, meets the engineering requirements of low underground water content and hard soil quality similar to those in the northwest region, and achieves improvement of work efficiency and cost saving.
In order to achieve the above object, a method for constructing a concrete pile according to the present invention includes the steps of:
1) and (3) sinking the casing to a set depth at the pile position, wherein the sinking mode comprises one or the combination of the following modes:
directly sinking a protective cylinder into a soil body in a hammering or vibration or static pressure mode;
pile holes are formed in the soil body in advance in a mode of heavy hammer impact or auger drilling or rotary drilling to form holes, and then protective sleeves are placed in the pile holes;
thirdly, forming a cement-soil pile with a certain depth and a larger diameter by deep stirring or high-pressure rotary spraying, and then inserting a pile casing into the center of the cement-soil pile;
2) filling coarse aggregate into the casing in a plurality of times, and tamping or extruding the filled coarse aggregate in one of the following modes:
firstly, lifting a slender heavy hammer for a certain height and then dropping to tamp coarse aggregate;
secondly, driving a flat-bottomed steel pipe to tamp coarse aggregates by up-and-down acting of a diesel hammer or a hydraulic hammer;
thirdly, extruding the coarse aggregate by holding and clamping a static-pressure pile machine and pressing down the flat-bottom steel pipe;
3) repeating the operation of the step 2) until the coarse aggregate with set amount is filled and tamped or extruded;
4) filling fine aggregate into the casing in multiple times, and tamping or extruding the filled fine aggregate in one of the following modes:
firstly, lifting a slender heavy hammer for a certain height and then dropping to tamp fine aggregate;
secondly, driving a flat-bottomed steel pipe to tamp the fine aggregate by up-and-down acting of a diesel hammer or a hydraulic hammer;
thirdly, extruding the fine aggregate by holding and clamping a static pressure pile machine and pressing down the flat-bottom steel pipe;
5) repeating the operation of the step 4) until the fine aggregate with set amount is filled and tamped or extruded, so that the soil body below the pile end in a certain depth and range is reinforced and compacted;
6) according to geological conditions and design requirements, the construction of the pile body is carried out by one of the following methods:
firstly, casting a concrete pile body in situ: after sinking a reinforcement cage into the pile casing, pouring pile body concrete, and then putting the pile casing out to form a pile; secondly, casting a concrete pile body in situ: after concrete is poured into the pile casing, reversely inserting a reinforcement cage into the concrete, and then lifting the pile casing to form a pile; thirdly, prefabricating a concrete pile body: after the precast concrete pile body is implanted into the pile casing, the pile casing is lifted out, and a gap between the precast concrete pile body and the wall of the pile hole is filled with a curing agent; fourthly, prefabricating the concrete pile body: after the pile casing is lifted, the pile hole is used as a guide to implant the precast concrete pile body in a hammering or static pressure mode.
In the second mode in the step 1) of the construction method of the concrete pile, the casing is arranged in a hammering or vibrating or static pressure mode.
In the step 2) of the construction method of the concrete pile, the filled coarse aggregate is loose material with larger grain diameter, and the types of the material include one or more of pebbles, broken stones, slag, steel slag, concrete blocks and broken bricks.
In the step 4) of the construction method of the concrete pile, the filled fine aggregate is a loose material with a small particle size, and the material includes one or more of cement, cement soil, cement sand, plain soil, fly ash, lime and dry hard concrete, and also includes a concrete admixture.
In the steps 2) to 5) of the construction method of the concrete pile, the coarse aggregate and the fine aggregate can be replaced according to geological conditions and design requirements, for example, the fine aggregate is used all the time, the coarse aggregate is used all the time, or the fine aggregate is used all the time, and then the coarse aggregate is used.
In the steps 2) to 5) of the construction method of the concrete pile, the quantity of the coarse aggregate or the fine aggregate filled in each time is not excessive, and the tamping or extruding times after each filling is not more than 10 times.
In step 5) of the construction method of the concrete pile, when a tamping mode of a slender heavy hammer or a diesel hammer or a hydraulic hammer is adopted, after filling and tamping or extrusion of fine aggregate is completed, pile end compactness is detected by adopting a penetration standard, namely, the penetration of 3-10 strikes of the slender heavy hammer or the diesel hammer or the hydraulic hammer is measured, when a penetration measured value meets a design value, tamping is stopped, and when the penetration measured value does not meet the design value, the fine aggregate is continuously filled and tamped until the penetration measured value meets the design value; the penetration degree refers to the current sinking value after the slender heavy hammer or the diesel hammer or the hydraulic hammer freely falls and hits the bottom filler at the same height under the condition of no filler, and the penetration degree is 1 hit.
In the third mode and the fourth mode of the step 6) of the construction method of the concrete pile, the precast concrete pile body comprises a precast concrete solid pile, a prestressed pipe pile, a precast hollow bamboo joint pile and a precast hollow square pile.
In the third mode and the fourth mode of the step 6) of the construction method of the concrete pile, when the prestressed pipe pile, the prefabricated hollow bamboo joint pile and the prefabricated hollow square pile are adopted, concrete is poured into a center hole of the pile or is poured after a reinforcement cage is placed according to geological conditions and design requirements.
In order to achieve the above object, the present invention further includes another method for constructing a concrete pile, which is particularly suitable for geological conditions with hard soil, low water content and low collapse tendency, the method comprising the steps of:
1) at the pile position, forming a pile hole in the soil body to a set depth by one of the following methods:
firstly, lifting a slender heavy hammer to a certain height and impacting a soil body to form a pile hole after falling;
secondly, driving the bottom sealing steel pipe to sink downwards in the soil body by using a diesel hammer or a vibration head or a hydraulic hammer, and lifting the bottom sealing steel pipe after the set depth is reached;
thirdly, forming a pile hole in the soil body by drilling a hole by spiral drilling or rotary drilling;
2) filling coarse aggregate into the pile hole in times, and tamping or extruding the filled coarse aggregate in one of the following modes:
firstly, lifting a slender heavy hammer for a certain height and then dropping to tamp coarse aggregate;
secondly, driving a flat-bottomed steel pipe to tamp coarse aggregates by up-and-down acting of a diesel hammer or a hydraulic hammer;
thirdly, extruding the coarse aggregate by holding and clamping a static-pressure pile machine and pressing down the flat-bottom steel pipe;
3) repeating the operation of the step 2) until the coarse aggregate with set amount is filled and tamped or extruded;
4) filling fine aggregate into the pile hole in times, and tamping or extruding the filled fine aggregate in one of the following modes:
firstly, lifting a slender heavy hammer for a certain height and then dropping to tamp fine aggregate;
secondly, driving a flat-bottomed steel pipe to tamp the fine aggregate by up-and-down acting of a diesel hammer or a hydraulic hammer;
thirdly, extruding the fine aggregate by holding and clamping a static pressure pile machine and pressing down the flat-bottom steel pipe;
5) repeating the operation of the step 4) until the fine aggregate with set amount is filled and tamped or extruded, so that the soil body below the pile end in a certain depth and range is reinforced and compacted;
6) according to geological conditions and load requirements, the construction of the pile body is carried out by one of the following methods:
firstly, casting a concrete pile body in situ: after sinking a reinforcement cage into the pile hole, pouring pile body concrete to form a pile; secondly, casting a concrete pile body in situ: after concrete is poured into the pile hole, a reinforcement cage is reversely inserted into the concrete to form a pile; thirdly, prefabricating a concrete pile body: implanting a precast concrete pile body into the pile hole, and filling a gap between the precast concrete pile body and the wall of the pile hole with a curing agent; fourthly, prefabricating the concrete pile body: and (3) implanting the precast concrete pile body by hammering or static pressure by taking the pile hole as a guide.
In step 2) of the another concrete pile construction method, the filled coarse aggregate is a loose material with a large particle size, and the types of the material include one or more of pebbles, broken stones, slag, steel slag, concrete blocks and broken bricks.
In step 4) of the another concrete pile construction method, the fine aggregate is a loose material with a small particle size, and the material includes one or more of cement, cement soil, cement sand, plain soil, fly ash, lime and dry hard concrete, and also includes a concrete admixture.
In the above-mentioned another concrete pile construction method, in the steps 2) to 5), the coarse aggregate and the fine aggregate can be replaced according to geological conditions and design requirements, for example, the fine aggregate is used all the time, the coarse aggregate is used all the time, or the fine aggregate is used all the time, and then the coarse aggregate is used.
In the steps 2) to 5) of the other construction method for the concrete pile, the number of the coarse aggregate or the fine aggregate filled in each time is not required to be too large, and the tamping or extruding times after each filling is not more than 10 times.
In step 5) of the another concrete pile construction method, when a tamping mode of a slender heavy hammer or a diesel hammer or a hydraulic hammer is adopted, after filling and tamping or squeezing fine aggregate is completed, pile end compactness is detected by adopting a penetration standard, namely, the penetration of 3-10 strikes of the slender heavy hammer or the diesel hammer or the hydraulic hammer is measured, when a penetration measurement value meets a design value, tamping is stopped, and when the penetration measurement value does not meet the design value, the fine aggregate is continuously filled and tamped until the penetration measurement value meets the design value; the penetration degree refers to the current sinking value after a slender weight or a diesel weight or a hydraulic weight freely falls and hits bottom end filling materials at the same height under the condition of no filling materials, and the penetration degree is 1 hit.
In the third mode and the fourth mode of the step 6) of the another concrete pile construction method, the precast concrete pile body comprises a precast concrete solid pile, a prestressed pipe pile, a precast hollow bamboo joint pile and a precast hollow square pile.
In the third mode and the fourth mode of the step 6) of the another concrete pile construction method, when the prestressed pipe pile, the prefabricated hollow bamboo joint pile and the prefabricated hollow square pile are adopted, concrete is poured into a central hole of the pile or is poured after a reinforcement cage is placed according to geological conditions and design requirements.
The construction method of the concrete pile has the main technical characteristics and advantages that:
the pile end bearing capacity is obviously improved: the method comprises the steps of firstly tamping and filling coarse aggregate at a pile end to form an outer layer of a pile end compaction body, then tamping and filling fine aggregate to form an inner layer of the pile end compaction body, gradually reducing the strength and modulus from inside to outside, gradually diffusing the pressure of a load in the process of transferring during stress, being equivalent to a multi-stage expansion foundation, fully exerting the bearing capacity of a pile end foundation soil body, and diffusing, reducing and reducing the stress borne by a pile body layer by layer, thereby remarkably improving the bearing capacity of the pile, and improving the ultimate bearing capacity by 2-3 times compared with a common cast-in-place pile.
Secondly, the method is particularly suitable for the requirements of projects with low underground water content, hard soil and relatively average bearing capacity in northwest areas.
And thirdly, various equipment can be selected to be combined in the construction process: construction equipment is various in selection, piling equipment with a ramming hammer, a diesel hammer, a hydraulic hammer and a vibrating head and static pressure equipment can be implemented, and can be allocated nearby according to specific places of engineering, so that the transportation cost and the time cost are reduced, and the construction process is more flexible and convenient.
The components of the coarse aggregate and the fine aggregate are various: the method is not limited by a certain construction material any more, and can be fully used for the tamping process of the pile end compacting body by using local materials.
The hole forming process can adopt various means, the pile body construction can adopt cast-in-place and prefabrication, and the application range is obviously improved.
Drawings
Fig. 1 is a process view of an embodiment of a method of constructing a concrete pile according to the present invention; in fig. 1, 1 is a diesel hammer, 2 is a casing, 3 is coarse aggregate, 4 is a heavy hammer, 5 is fine aggregate, 6 is a precast concrete pile body, 7 is a reinforcement cage, and 8 is concrete.
Detailed Description
The invention is further illustrated by the following specific examples.
Fig. 1 is a process diagram of an embodiment of a method for constructing a carrier pile according to the present invention, first, as shown in a of fig. 1, a casing 2 having a prefabricated pile tip is hammered at a pile position in a foundation by a diesel hammer 1 to sink the casing 2 to a designed depth; then, as shown in b in fig. 1, filling a small amount of coarse aggregate 3 into the casing 2, wherein the coarse aggregate comprises broken stones and concrete blocks, placing a slender heavy hammer 4 in the casing 2, lifting the slender heavy hammer 4 for a certain height, then making free fall, and tamping the coarse aggregate 3; then, as shown in c in fig. 1, the operation of filling and tamping by a heavy hammer is repeated, and the set coarse aggregate of 0.4 cubic meter is filled and tamped; then, as shown in d in fig. 1, filling a small amount of fine aggregate 5 into the casing 2, wherein the fine aggregate comprises cement, sand and lime, continuously lifting the slender heavy hammer 4 for a certain height, then freely falling, and tamping the fine aggregate 5; then, as shown in e in fig. 1, repeating the operation of filling and tamping by a heavy hammer, and filling and tamping the fine aggregate 5 of 0.3 cubic meter; then, as shown in f in fig. 1, lifting a pile casing 2 and a heavy hammer 4, vertically placing a prestressed pipe pile 6 above a pile hole, and hammering the pile top of the prestressed pipe pile 6 by using a diesel hammer 1 to enable the pile top to sink downwards by taking the pile hole as a guide; finally, as shown in g in fig. 1, after the prestressed pipe pile 6 is sunk to a set depth, a reinforcement cage 7 is placed in the central hole of the prestressed pipe pile 6, and concrete 8 is poured into the central hole, thereby completing the construction of the pile.
The above embodiments are illustrative only and not restrictive, and the scope of the invention is not to be limited thereto, and various changes and modifications in other forms can be made on the basis of the above description and are within the scope of the invention.
Claims (17)
1. A construction method of a concrete pile is characterized by comprising the following steps:
1) and (3) sinking the casing to a set depth at the pile position, wherein the sinking mode comprises one or the combination of the following modes:
directly sinking a protective cylinder into a soil body in a hammering or vibration or static pressure mode;
pile holes are formed in the soil body in advance in a mode of heavy hammer impact or auger drilling or rotary drilling to form holes, and then protective sleeves are placed in the pile holes;
thirdly, forming a cement-soil pile with a certain depth and a larger diameter by deep stirring or high-pressure rotary spraying, and then inserting a pile casing into the center of the cement-soil pile;
2) filling coarse aggregate into the casing in a plurality of times, and tamping or extruding the filled coarse aggregate in one of the following modes:
firstly, lifting a slender heavy hammer for a certain height and then dropping to tamp coarse aggregate;
secondly, driving a flat-bottomed steel pipe to tamp coarse aggregates by up-and-down acting of a diesel hammer or a hydraulic hammer;
thirdly, extruding the coarse aggregate by holding and clamping a static-pressure pile machine and pressing down the flat-bottom steel pipe;
3) repeating the operation of the step 2) until the coarse aggregate with set amount is filled and tamped or extruded;
4) filling fine aggregate into the casing in multiple times, and tamping or extruding the filled fine aggregate in one of the following modes:
firstly, lifting a slender heavy hammer for a certain height and then dropping to tamp fine aggregate;
secondly, driving a flat-bottomed steel pipe to tamp the fine aggregate by up-and-down acting of a diesel hammer or a hydraulic hammer;
thirdly, extruding the fine aggregate by holding and clamping a static pressure pile machine and pressing down the flat-bottom steel pipe;
5) repeating the operation of the step 4) until the fine aggregate with set amount is filled and tamped or extruded, so that the soil body below the pile end in a certain depth and range is reinforced and compacted;
6) according to geological conditions and design requirements, the construction of the pile body is carried out by one of the following methods:
firstly, casting a concrete pile body in situ: after sinking a reinforcement cage into the pile casing, pouring pile body concrete, and then putting the pile casing out to form a pile; secondly, casting a concrete pile body in situ: after concrete is poured into the pile casing, reversely inserting a reinforcement cage into the concrete, and then lifting the pile casing to form a pile; thirdly, prefabricating a concrete pile body: after the precast concrete pile body is implanted into the pile casing, the pile casing is lifted out, and a gap between the precast concrete pile body and the wall of the pile hole is filled with a curing agent; fourthly, prefabricating the concrete pile body: after the pile casing is lifted, the pile hole is used as a guide to implant the precast concrete pile body in a hammering or static pressure mode.
2. The method for constructing a concrete pile according to claim 1, wherein the step 1) is performed in a mode (II) in which the casing is inserted by hammering, vibration or static pressure.
3. The method for constructing a concrete pile according to claim 1, wherein the coarse aggregate filled in the step 2) is a loose material having a large particle size, and the type of the material includes one or more of pebbles, crushed stone, slag, steel slag, concrete blocks, and broken bricks.
4. The method for constructing a concrete pile according to claim 1, wherein the fine aggregate filled in step 4) is a loose material having a small particle size, and the type of the material includes one or more of cement, cement soil, cement sand, plain soil, fly ash, lime, and dry and hard concrete, and further includes a concrete admixture.
5. The method for constructing a concrete pile according to claim 1, wherein in the steps 2) to 5), the coarse aggregate and the fine aggregate can be replaced according to geological conditions and design requirements, such as using the fine aggregate all the time, using the coarse aggregate all the time, or using the fine aggregate first and then using the coarse aggregate.
6. The method for constructing a concrete pile according to claim 1, wherein the amount of the coarse aggregate or the fine aggregate is not excessively increased in each of the steps 2) to 5), and the number of times of the tamping or the pressing after each filling is not more than 10.
7. The method for constructing concrete pile according to claim 1, wherein in the step 5), when the tamping mode of slender heavy hammer or diesel hammer or hydraulic hammer is adopted, after the fine aggregate is filled and tamped or extruded, the compactness of pile end is detected by using the penetration standard, i.e. the penetration of 3-10 strokes of slender heavy hammer or diesel hammer or hydraulic hammer is measured, when the penetration measured value meets the design value, the tamping is stopped, when the penetration measured value does not meet the design value, the fine aggregate is continuously filled and tamped until the penetration measured value meets the design value; the penetration degree refers to the current sinking value after a slender weight or a diesel weight or a hydraulic weight freely falls and hits bottom end filling materials at the same height under the condition of no filling materials, and the penetration degree is 1 hit.
8. The method for constructing a concrete pile according to claim 1, wherein in the third mode and the fourth mode of step 6), the precast concrete pile body comprises a precast concrete solid pile, a prestressed pipe pile, a precast hollow bamboo joint pile and a precast hollow square pile.
9. The method for constructing a concrete pile according to claim 1, wherein in the third and fourth modes of step 6), when the prestressed pipe pile, the prefabricated hollow bamboo joint pile and the prefabricated hollow square pile are adopted, concrete is poured into a central hole of the pile or poured after a reinforcement cage is placed according to geological conditions and design requirements.
10. A construction method of a concrete pile is characterized by comprising the following steps:
1) at the pile position, forming a pile hole in the soil body to a set depth by one of the following methods:
firstly, lifting a slender heavy hammer to a certain height and impacting a soil body to form a pile hole after falling;
secondly, driving the bottom sealing steel pipe to sink downwards in the soil body by using a diesel hammer or a vibration head or a hydraulic hammer, and lifting the bottom sealing steel pipe after the set depth is reached;
thirdly, forming a pile hole in the soil body by drilling a hole by spiral drilling or rotary drilling;
2) filling coarse aggregate into the pile hole in times, and tamping or extruding the filled coarse aggregate in one of the following modes:
firstly, lifting a slender heavy hammer for a certain height and then dropping to tamp coarse aggregate;
secondly, driving a flat-bottomed steel pipe to tamp coarse aggregates by up-and-down acting of a diesel hammer or a hydraulic hammer;
thirdly, extruding the coarse aggregate by holding and clamping a static-pressure pile machine and pressing down the flat-bottom steel pipe;
3) repeating the operation of the step 2) until the coarse aggregate with set amount is filled and tamped or extruded;
4) filling fine aggregate into the pile hole in times, and tamping or extruding the filled fine aggregate in one of the following modes:
firstly, lifting a slender heavy hammer for a certain height and then dropping to tamp fine aggregate;
secondly, driving a flat-bottomed steel pipe to tamp the fine aggregate by up-and-down acting of a diesel hammer or a hydraulic hammer;
thirdly, extruding the fine aggregate by holding and clamping a static pressure pile machine and pressing down the flat-bottom steel pipe;
5) repeating the operation of the step 4) until the fine aggregate with set amount is filled and tamped or extruded, so that the soil body below the pile end in a certain depth and range is reinforced and compacted;
6) according to geological conditions and design requirements, the construction of the pile body is carried out by one of the following methods:
firstly, casting a concrete pile body in situ: after sinking a reinforcement cage into the pile hole, pouring pile body concrete to form a pile; secondly, casting a concrete pile body in situ: after concrete is poured into the pile hole, a reinforcement cage is reversely inserted into the concrete to form a pile; thirdly, prefabricating a concrete pile body: implanting a precast concrete pile body into the pile hole, and filling a gap between the precast concrete pile body and the wall of the pile hole with a curing agent; fourthly, prefabricating the concrete pile body: and (3) implanting the precast concrete pile body by hammering or static pressure by taking the pile hole as a guide.
11. The method for constructing a concrete pile according to claim 10, wherein the coarse aggregate filled in the step 2) is a loose material having a large particle size, and the type of the material includes one or more of pebbles, crushed stone, slag, steel slag, concrete blocks, and broken bricks.
12. The method for constructing a concrete pile according to claim 10, wherein the fine aggregate filled in step 4) is a loose material having a small particle size, and the type of the material includes one or more of cement, cement soil, cement sand, plain soil, fly ash, lime, and dry and hard concrete, and further includes a concrete admixture.
13. The method for constructing a concrete pile according to claim 10, wherein in the steps 2) to 5), the coarse aggregate and the fine aggregate can be replaced according to geological conditions and design requirements, such as using the fine aggregate all the time, using the coarse aggregate all the time, or using the fine aggregate first and then using the coarse aggregate.
14. The method of constructing a concrete pile according to claim 10, wherein the amount of coarse or fine aggregate is not so large in each of the steps 2) to 5), and the number of times of tamping or pressing after each filling is not more than 10.
15. The method for constructing a concrete pile according to claim 10, wherein in the step 5), when the tamping mode of the slender weight or the diesel hammer or the hydraulic hammer is adopted, after the fine aggregate is filled and tamped or extruded, the pile end compactness is detected by adopting the penetration standard, namely, the penetration of 3-10 strikes of the slender weight or the diesel hammer or the hydraulic hammer is measured, when the penetration measured value meets the design value, the tamping is stopped, and when the penetration measured value does not meet the design value, the fine aggregate is continuously filled and tamped until the penetration measured value meets the design value; the penetration degree refers to the current sinking value after a slender weight or a diesel weight or a hydraulic weight freely falls and hits bottom end filling materials at the same height under the condition of no filling materials, and the penetration degree is 1 hit.
16. The method for constructing a concrete pile according to claim 10, wherein in the third and fourth modes of step 6), the precast concrete pile body includes a precast concrete solid pile, a prestressed pipe pile, a precast hollow bamboo joint pile, and a precast hollow square pile.
17. The method for constructing a concrete pile according to claim 10, wherein in the third and fourth modes of step 6), when a prestressed pipe pile, a prefabricated hollow bamboo joint pile or a prefabricated hollow square pile is used, concrete is poured into a central hole of the pile or poured after a reinforcement cage is placed according to geological conditions and design requirements.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553005A (en) * | 2003-11-21 | 2004-12-08 | 王继忠 | Concrete pile construction method |
| CN201056691Y (en) * | 2007-07-17 | 2008-05-07 | 任西明 | Static pressure cloven-footed pile with compound carrier |
| CN105064332A (en) * | 2015-07-14 | 2015-11-18 | 王继忠 | Construction method for bearing base piles of square pile bodies |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553005A (en) * | 2003-11-21 | 2004-12-08 | 王继忠 | Concrete pile construction method |
| CN201056691Y (en) * | 2007-07-17 | 2008-05-07 | 任西明 | Static pressure cloven-footed pile with compound carrier |
| CN105064332A (en) * | 2015-07-14 | 2015-11-18 | 王继忠 | Construction method for bearing base piles of square pile bodies |
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