CN113863314A - Synchronous construction method for concrete occlusion supporting pile and main engineering pile - Google Patents
Synchronous construction method for concrete occlusion supporting pile and main engineering pile Download PDFInfo
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- CN113863314A CN113863314A CN202111137250.6A CN202111137250A CN113863314A CN 113863314 A CN113863314 A CN 113863314A CN 202111137250 A CN202111137250 A CN 202111137250A CN 113863314 A CN113863314 A CN 113863314A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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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
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a synchronous construction method of a concrete occlusion support pile and a main engineering pile, which comprises the following steps: 1) designing a supporting structure of the foundation pit according to the excavation depth, the geology, the water level and the construction process of the foundation pit, and determining the pile length, the pile diameter, the reinforcing steel bars, the engagement width, the concrete design strength and the inner support of the concrete occlusive pile; 2) according to the concrete arrangement form of the engineering pile group piles, firstly constructing part of engineering piles; 3) after the concrete of the part of engineering piles is formed and the design strength reaches 80%, a percussion drill is selected to construct I-sequence piles close to the formed engineering piles and far away from the engineering piles in the drilling period, wherein the pile foundations of the I-sequence piles in each drilling period and the maintenance period need to keep the distance of at least 2 times of the pile diameter of the support piles. The invention has the advantages of improving the construction efficiency of the support pile, accelerating the whole construction progress of the project and providing the synchronous construction method of the concrete occluded support pile and the main engineering pile.
Description
Technical Field
The invention relates to the field of civil engineering bridge foundation construction. More particularly, the invention relates to a synchronous construction method of a concrete occlusion support pile and a main engineering pile.
Background
At present, the traditional concrete secant pile construction method is divided into a soft method and a hard method. When the soft method is used for construction, a guide wall is usually required to be arranged, retarder is required to be added into concrete of the first-order pile, and the second-order pile is common concrete; during hard construction, common concrete is adopted for the piles in the I sequence and the piles in the II sequence, and the piles in the II sequence are cut and formed by a full-casing full-slewing drilling machine with large torque or an ultra-high-power rotary drilling machine. In general, when the steel is used as an excavation supporting, other structures cannot be synchronously constructed in the region, so that the steel is difficult to be applied when the steel is synchronously constructed with main engineering piles such as bridges, and the steel is mainly used for the following defects: if a soft method is adopted, the strength of the delayed coagulation concrete is greatly influenced by the environment, the quality is difficult to control, and the delayed coagulation concrete is influenced by the space such as site main body engineering pile construction facilities and the like, so that a guide wall is difficult to arrange; if a hard method is adopted, the required field for hard cutting of conventional large equipment is large, multiple pieces of equipment cannot operate simultaneously, otherwise, the space conflict with main engineering pile construction facilities and the like is easy, and the rental cost of the large equipment is high.
Disclosure of Invention
The invention provides a synchronous construction method of a concrete occlusion supporting pile and a main engineering pile, aiming at solving the defects in the background technology, improving the construction efficiency of the supporting pile and accelerating the whole construction progress of the engineering.
To achieve these objects and other advantages in accordance with the present invention, there is provided a method for simultaneously constructing a concrete interlocking support pile and a main engineering pile, comprising the steps of:
1) according to the excavation depth, the geology, the water level and the construction process of the foundation pit, designing a supporting structure of the foundation pit, and determining the pile length, the pile diameter, the reinforcing bars, the engagement width, the concrete design strength, the inner support and the like of the concrete occlusive pile; considering that the piles in the I and II sequences are both subjected to hard punching construction by a common impact drilling machine, the pile diameter of the concrete cast-in-place pile is correspondingly increased in the design stage (the maximum standard is 1.2m), the area ratio of the area of the occluded part to the area of the formed piles in the I sequence is reduced, and the pile foundation is prevented from being cracked by combining theoretical calculation and process pile testing.
2) According to the concrete arrangement form of the engineering pile group piles, firstly constructing part of engineering piles;
3) after the concrete of the part of engineering piles is formed and the design strength reaches 80%, selecting a common impact drilling machine to carry out hard punching construction, wherein the impact drilling machine is of a common type, the requirement on equipment is low, and constructing I-sequence piles which are close to the formed engineering piles and far away from the engineering piles in the drilling period, wherein pile foundations in each drilling period and maintenance period of the I-sequence piles need to keep the distance of at least 2 times of the pile diameter of the supporting piles, so that the construction vibration influence among the pile foundations is reduced; during the construction of the pile foundation in each drilling period and maintenance period, the spacing to be maintained depends on corresponding specifications and calculation analysis under different conditions, and the principle of not influencing the hole forming and forming quality of the pile foundation is taken as a principle.
4) After drilling and pouring are finished, the concrete of the first-order pile is transferred to the position of a drilling machine to construct the next first-order pile meeting the spacing condition;
5) the circulation operation continues to construct the residual I-sequence piles meeting the spacing condition; if the construction of the engineering pile is completed and the engineering pile is formed in the period, constructing I-sequence piles on the periphery of the engineering pile, and uniformly constructing II-sequence piles after all I-sequence piles are constructed; if the engineering pile is not completed in the period, constructing a second-order pile between two formed first-order piles;
6) after the drilling of the second-order pile is finished, putting down a reinforcement cage (the reinforcement cage is preferably provided with a sound detection pipe) and before pouring concrete, directionally cleaning mud skin of the pile body of the first-order pile to ensure the engagement quality of the concrete of the first-order pile and the second-order pile;
7) and (5) circulating operation until all the piles in the I and II sequences are molded.
Preferably, the method further comprises the following steps:
8) performing ultrasonic pile inspection on the pile foundation, and analyzing the pile forming quality of the support pile; according to the pile-forming quality analysis of the support pile, high-pressure cement slurry reinforcement treatment is carried out on the periphery of the outer side of the support pile for the parts with poor occlusion effect, pile body integrity and the like; when the high-pressure water injection slurry is used for reinforcing, modes such as compaction grouting, split grouting, penetration grouting or high-pressure rotary jetting are reasonably selected according to the soil property.
Preferably, the method further comprises the following steps: 9) excavating the top earthwork of the supporting structure, breaking the pile head of the supporting pile, constructing a crown beam, an inner support and the like, and performing subsequent construction such as excavation of a foundation pit, dewatering and drainage and the like.
Preferably, the I-sequence piles are plain concrete or square steel reinforcement cage concrete.
Preferably, when directionally cleaning the mud skin of the pile body of the I-order pile, a mud skin cleaning tool with a wire brush and high-pressure water or other modes with better effects are adopted, the hole wall parts except the pile body of the I-order pile cannot be cleaned, and hole collapse is prevented.
The invention at least comprises the following beneficial effects:
reliability: the supporting structure in the invention is specially designed to meet the safety requirement of foundation pit supporting; a certain interval is controlled during construction of each pile foundation, so that the influence of close-range vibration on hole forming and pile forming quality is avoided; the arrangement of the acoustic pipe of the support pile is used for quality detection, grouting reinforcement measures are prepared, and stability and waterproofness of foundation pit support are guaranteed.
Economy, energy conservation: the synchronous construction process avoids the phenomenon of 'labor saving', and saves the construction period; the adoption of large-scale drilling equipment and the adoption of a common impact drill are relatively avoided, and the drilling equipment of the supporting piles and the engineering piles can be shared in a turnover mode, so that equipment lease fees and the energy consumption of the large-scale equipment are saved.
The application range is wide: the invention has better applicability to the foundation pit adopting the concrete occluded supporting pile and the engineering which needs to be synchronously constructed with the main body structure in the foundation pit.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic view of a part of the engineering pile which is constructed in step 2) firstly;
fig. 2 is a schematic view of the construction of the i-sequence pile in step 3) close to the formed engineering pile and far from the engineering pile during drilling;
FIG. 3 is a schematic diagram of I-sequence pile concrete after drilling and pouring in the step 4);
FIG. 4 is a schematic view of the position of the transfer rig in step 4);
FIG. 5 is a schematic diagram of the first-order pile at the beginning of the next drilling stage in step 4);
FIG. 6 is a schematic view of the complete drilling and maintenance of the remaining engineering piles in step 5);
FIG. 7 is a schematic diagram of the completion of drilling of the second-order pile 4.4 in the drilling stage of step 6);
FIG. 8 is a schematic view of the completion of the cycle of step 7);
FIG. 9 is a schematic diagram of pile body mud skin of the I-order pile;
FIG. 10 is a schematic view of the outer periphery of a support pile being reinforced with high pressure cement.
Description of reference numerals: 1.1-engineering pile in drilling period, 1.2-engineering pile in maintenance period, 1.3-formed engineering pile, 2.1-engineering pile drilling machine, 2.2-supporting pile drilling machine, 3.1-design I-order pile, 3.2-design II-order pile, 4.1-drilling I-order pile, 4.2-maintenance I-order pile, 4.3-formed I-order pile, 4.4-drilling II-order pile, 4.5-maintenance II-order pile, 4.6-formed II-order pile, 5.1-II-order pile hole wall, 5.2-I-order pile body mud skin and 6.1-supporting pile outside grouting reinforcement treatment.
Detailed Description
The invention will be described more fully hereinafter with reference to the accompanying drawings. Those skilled in the art will be able to implement the invention based on these teachings. Before the present invention is described in detail with reference to the accompanying drawings, it is to be noted that: the technical solutions and features provided in the present invention in the respective sections including the following description may be combined with each other without conflict.
Moreover, the embodiments of the present invention described in the following description are generally only some embodiments of the present invention, and not all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
The invention is further described in detail with reference to the accompanying drawings and implementation, and the specific implementation process is as follows:
the invention provides a synchronous construction method of a concrete occluded supporting pile and a main body engineering pile, which is used for successfully constructing a foundation pit of a bearing platform of a No. 1 main pier of a certain bridgework, and comprises the following steps:
1) according to the excavation depth, the geology, the water level and the construction process of the foundation pit, the design of a supporting structure of the foundation pit is carried out, and the design of the first-order pile 3.1, the design of the second-order pile 3.2, the pile length, the pile diameter, the reinforcement, the engagement width, the concrete design strength, the inner support and the like of the concrete engaged pile are determined.
2) As shown in fig. 1, according to the specific arrangement form of the engineering pile group piles, a part of the engineering piles, namely the formed engineering piles 1.3, are constructed.
3) As shown in fig. 2, after the concrete of the part of the engineering pile is formed and reaches 80% of the design strength, a common impact drilling machine is selected to construct a first-order pile 4.1 in a drilling period close to the formed engineering pile 1.3 and far away from the engineering pile 1.1 in the drilling period, wherein the pile foundations in each drilling period and maintenance period (the first-order pile 4.1 in the drilling period, the first-order pile 4.2 in the maintenance period, the second-order pile 4.4 in the drilling period and the second-order pile 4.5 in the maintenance period) need to be kept at least 2 times of the pile diameter of the supporting pile, so that the construction vibration influence among the pile foundations is reduced.
4) As shown in the figures 3-5, after I-sequence pile concrete is drilled and poured, I-sequence piles 4.2 in the maintenance period are formed, the next I-sequence piles 3.1 meeting the space condition are designed in the position construction of the transfer drilling machine, and the I-sequence piles 4.1 in the next drilling period are started.
5) As shown in fig. 6, the circulation operation is continued to construct the remaining designed I-sequence piles 3.1 meeting the spacing condition; if the engineering pile passes through two links of an engineering pile 1.1 in a drilling period and an engineering pile 1.2 in a maintenance period and forms a formed engineering pile 1.3 in the period, constructing design I-sequence piles 3.1 on the periphery of the engineering pile, and uniformly constructing and designing second-sequence piles 3.2 after all the design I-sequence piles 3.1 are constructed; if the engineering pile is not completed in the period, a design II-sequence pile 3.2 between two formed I-sequence piles 4.3 can be constructed firstly.
6) After 4.4 holes are drilled in the II-sequence pile in the drilling period, a steel reinforcement cage (provided with a sounding pipe) is placed downwards, and before concrete is poured, the mud skin 5.2 of the pile body of the I-sequence pile needs to be directionally cleaned as shown in fig. 9, so that the engagement quality of the concrete of the I-sequence pile and the II-sequence pile is guaranteed.
7) And (3) as shown in fig. 8, circulating operation until all the formed first-order piles 4.3 and the formed second-order piles 4.6 are finished, then performing ultrasonic pile inspection on the pile foundations, and analyzing the pile forming quality of the formed first-order piles 4.3 and the formed second-order piles 4.6.
8) As shown in fig. 10, according to the pile-forming quality analysis of the support pile, the high-pressure cement-grouting reinforcement treatment is performed on the outer periphery of the support pile for the part with poor occlusion effect, pile body integrity and the like 6.1.
9) And finally, excavating the top earthwork of the supporting structure, breaking the pile head of the supporting pile, constructing a crown beam, an inner support and the like, and performing subsequent construction such as excavation of a foundation pit, drainage and the like.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable to various fields of endeavor for which the invention may be embodied with additional modifications as would be readily apparent to those skilled in the art, and the invention is therefore not limited to the details given herein and to the embodiments shown and described without departing from the generic concept as defined by the claims and their equivalents.
Claims (5)
1. A synchronous construction method of a concrete occlusion support pile and a main engineering pile is characterized by comprising the following steps:
1) designing a supporting structure of the foundation pit according to the excavation depth, the geology, the water level and the construction process of the foundation pit, and determining the pile length, the pile diameter, the reinforcing steel bars, the engagement width, the concrete design strength and the inner support of the concrete occlusive pile;
2) according to the concrete arrangement form of the engineering pile group piles, firstly constructing part of engineering piles;
3) after the concrete of the part of engineering piles is molded and the design strength reaches 80%, selecting a percussion drill to construct I-sequence piles close to the molded engineering piles and far away from the engineering piles in the drilling period, wherein the pile foundations of the I-sequence piles in each drilling period and maintenance period need to keep the distance of at least 2 times of the pile diameter of the support pile;
4) after drilling and pouring are finished, the concrete of the first-order pile is transferred to the position of a drilling machine to construct the next first-order pile meeting the spacing condition;
5) the circulation operation continues to construct the residual I-sequence piles meeting the spacing condition; if the construction of the engineering pile is completed and the engineering pile is formed in the period, constructing I-sequence piles on the periphery of the engineering pile, and uniformly constructing II-sequence piles after all I-sequence piles are constructed; if the engineering pile is not completed in the period, constructing a second-order pile between two formed first-order piles;
6) after the drilling of the second-order pile is finished, directionally cleaning mud skin of the pile body of the first-order pile before a reinforcement cage is put down and concrete is poured;
7) and (5) circulating operation until all the piles in the I and II sequences are molded.
2. The method for the simultaneous construction of a concrete interlocking support pile and a main body engineering pile according to claim 1, further comprising the steps of:
8) performing ultrasonic pile inspection on the pile foundation, and analyzing the pile forming quality of the support pile; according to the pile-forming quality analysis of the support pile, high-pressure cement slurry reinforcement treatment is carried out on the periphery of the outer side of the support pile for the parts with poor occlusion effect, pile body integrity and the like.
3. The method for synchronously constructing a concrete interlocking support pile and a main engineering pile as claimed in claim 1 or 2, further comprising the steps of: 9) excavating the top earthwork of the supporting structure, breaking the pile head of the supporting pile, constructing a crown beam, an inner support and the like, and performing subsequent foundation pit excavation and drainage construction.
4. The method for synchronously constructing the concrete occlusion retaining pile and the main engineering pile as claimed in claim 1 or 2, wherein the first-order pile is plain concrete or square steel reinforcement cage concrete.
5. The method for synchronously constructing a concrete occlusion retaining pile and a main engineering pile as claimed in claim 1, wherein when directionally cleaning the mud-skin of the pile body of the first-order pile, the mud-skin cleaning tool with a wire brush and high-pressure water is used, and the hole wall parts except the pile body of the first-order pile cannot be cleaned.
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| CN202111137250.6A CN113863314B (en) | 2021-09-27 | 2021-09-27 | Synchronous construction method for concrete occlusion supporting pile and main engineering pile |
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| CN202111137250.6A CN113863314B (en) | 2021-09-27 | 2021-09-27 | Synchronous construction method for concrete occlusion supporting pile and main engineering pile |
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| CN113863314B CN113863314B (en) | 2023-03-17 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0911449A1 (en) * | 1997-10-24 | 1999-04-28 | Yinsheng Shi | A cast-in-place pile and the process for manufacturing of the same |
| WO2001046526A1 (en) * | 1999-12-21 | 2001-06-28 | Tristanagh Pty. Ltd. | Earth retention and piling systems |
| CN103306301A (en) * | 2013-07-04 | 2013-09-18 | 天津市天友建筑设计股份有限公司 | Pile foundation structure and construction method thereof based on fender post and basement baseplate |
| CN107989032A (en) * | 2017-11-28 | 2018-05-04 | 深圳市工勘岩土技术有限公司 | A kind of construction method of punching interlocking pile |
| CN110093934A (en) * | 2019-05-20 | 2019-08-06 | 中铁七局集团有限公司 | The nothing for going along with sb. to guard him pile driving construction suitable for subway leads wall construction method of interlocking pile |
| AU2020103672A4 (en) * | 2020-11-25 | 2021-02-04 | Beijing Building Materials Engineering Co. Ltd | Construction method of rotary drilling hole-forming and jet mixing cement-soil occlusion curtain piles |
| CN113089652A (en) * | 2021-02-23 | 2021-07-09 | 中铁十九局集团第三工程有限公司 | Occlusive pile construction method and reinforced structure |
-
2021
- 2021-09-27 CN CN202111137250.6A patent/CN113863314B/en active Active
Patent Citations (7)
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| EP0911449A1 (en) * | 1997-10-24 | 1999-04-28 | Yinsheng Shi | A cast-in-place pile and the process for manufacturing of the same |
| WO2001046526A1 (en) * | 1999-12-21 | 2001-06-28 | Tristanagh Pty. Ltd. | Earth retention and piling systems |
| CN103306301A (en) * | 2013-07-04 | 2013-09-18 | 天津市天友建筑设计股份有限公司 | Pile foundation structure and construction method thereof based on fender post and basement baseplate |
| CN107989032A (en) * | 2017-11-28 | 2018-05-04 | 深圳市工勘岩土技术有限公司 | A kind of construction method of punching interlocking pile |
| CN110093934A (en) * | 2019-05-20 | 2019-08-06 | 中铁七局集团有限公司 | The nothing for going along with sb. to guard him pile driving construction suitable for subway leads wall construction method of interlocking pile |
| AU2020103672A4 (en) * | 2020-11-25 | 2021-02-04 | Beijing Building Materials Engineering Co. Ltd | Construction method of rotary drilling hole-forming and jet mixing cement-soil occlusion curtain piles |
| CN113089652A (en) * | 2021-02-23 | 2021-07-09 | 中铁十九局集团第三工程有限公司 | Occlusive pile construction method and reinforced structure |
Non-Patent Citations (1)
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| 刘熙媛: "《基础工程》", 30 November 2009, 中国建材工业出版社 * |
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