CN117702742A - Construction method for locking buckle steel pipe pile combining hole guiding and reaming - Google Patents
Construction method for locking buckle steel pipe pile combining hole guiding and reaming Download PDFInfo
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- CN117702742A CN117702742A CN202311809938.3A CN202311809938A CN117702742A CN 117702742 A CN117702742 A CN 117702742A CN 202311809938 A CN202311809938 A CN 202311809938A CN 117702742 A CN117702742 A CN 117702742A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 121
- 239000010959 steel Substances 0.000 title claims abstract description 121
- 238000010276 construction Methods 0.000 title claims abstract description 94
- 238000005553 drilling Methods 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000011435 rock Substances 0.000 claims abstract description 15
- 238000010009 beating Methods 0.000 claims abstract description 8
- 238000003780 insertion Methods 0.000 claims abstract description 8
- 230000037431 insertion Effects 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims abstract description 8
- 238000013461 design Methods 0.000 claims abstract description 5
- 239000004567 concrete Substances 0.000 claims description 10
- 238000005086 pumping Methods 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/18—Placing by vibrating
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/04—Guide devices; Guide frames
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
-
- 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
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
-
- 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
- E02D5/54—Piles with prefabricated supports or anchoring parts; Anchoring piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/28—Placing of hollow pipes or mould pipes by means arranged inside the piles or pipes
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention provides a construction method of a lock catch steel pipe pile combining a hole guiding and reaming, and belongs to the technical field of bridge construction. In order to solve the problem that the prior cofferdam method is easy to influence by geological conditions, the steel pipe pile is difficult to insert and beat into a high-strength rock stratum, and the inserting and beating efficiency is low. Setting up a construction platform, reserving a lock catch steel pipe pile position, drilling at the lock catch steel pipe pile position by utilizing a rotary drilling rig, performing single-root installation and insertion drilling at the guide hole position by adopting a crawler crane and a vibrating hammer until the guide frame is no longer sinking, folding after manufacturing the guide frame, drilling a clear hole in the lock catch steel pipe pile by adopting rotary drilling after closure, continuing the guide hole by utilizing a reaming bit, and circulating the above operation until the design elevation is followed. The reaming type drilling can be used for continuing to conduct hole guiding construction at the bottom of the steel pipe, so that the construction difficulty of locking the steel pipe pile cofferdam in the deep water bare rock and hard rock areas is solved; the construction speed is high, the manufacture, the processing and the installation are convenient and flexible, the process is simple, the required equipment is less, and the construction cost is reduced.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a construction method of a lock catch steel pipe pile combining hole guiding and reaming.
Background
Along with the rapid progress of the economy in China, the engineering construction of the bridge crossing the large river in China is developed at a high speed. The underwater bridge construction difficulty is high, the construction period is long, and particularly, the construction investment of the foundation cofferdam is large, the safety risk is high, so that the construction method is a heavy difficult project for embodying the comprehensive capacity of an enterprise.
Generally, a deep water foundation is mostly constructed by adopting a cofferdam method, and at present, cofferdams commonly used in China comprise Lasen steel sheet pile cofferdams, locking steel pipe pile cofferdams, double-wall steel sleeve cofferdams and the like. Compared with other cofferdam forms, the lock catch steel pipe pile has the characteristics of strong adaptability, stable structure, short construction period, turnover use of materials and the like, and is suitable for the construction of underwater deep foundations. The steel pipe pile is difficult to insert and punch into a high-strength rock stratum under the influence of on-site geological conditions, and the inserting and driving efficiency is extremely low.
Disclosure of Invention
The invention aims to solve the technical problems that:
in order to solve the problem that the prior cofferdam method is easy to influence by geological conditions, the steel pipe pile is difficult to insert and punch into a high-strength rock stratum, and the inserting and punching efficiency is low.
The invention adopts the technical scheme for solving the technical problems:
the invention provides a construction method of a lock catch steel pipe pile combining hole guiding and reaming, which comprises the following steps:
step one, inserting and driving a lock catch steel pipe pile; firstly, building a construction platform, and reserving the position of the lock catch steel pipe pile when the construction platform is built; drilling holes in the positions of the lock catch steel pipe piles by using a rotary drilling rig, and performing single-root installation and insertion drilling on the lock catch steel pipe piles by adopting a crawler crane and a vibrating hammer until the lock catch steel pipe piles are no longer sunk;
step two, closure of the cofferdam; the inserting and driving sequence is that two sides are firstly constructed, then the upstream is closed at the corner piles, and finally the upstream reserved port is closed synchronously;
step three, hole guiding and reaming construction; after closure of the cofferdam, carrying out hole guiding and hole expanding anchor pile construction on all the lock catch steel pipe piles, wherein the anchor pile construction process comprises the steps of firstly adopting a rotary drilling drill to carry out hole guiding construction in the lock catch steel pipe piles, and then adopting a vibration hammer to carry out insertion and beating until the insertion and beating are not sinking any more after the hole guiding is at least 3m in the rock stratum; if the rock entering depth does not meet the requirement, reaming the lock catch steel pipe pile by using a reaming bit, and then guiding the hole for construction after reaming, and circulating the above operation until the design elevation is followed;
and fourthly, grouting construction is carried out on the outer side of the cofferdam after the anchor pile is constructed, pumping water is carried out in the cofferdam by adopting a high-power water pump, the enclosing wall is installed again after pumping water, foundation pit excavation is carried out in the cofferdam after installation is completed, pile heads are chiseled off, and cushion layer pouring is carried out.
In the first step, in order to ensure accurate pile sinking positions during construction, steel platforms and trestle steel pipe piles are used as guide frames, the guide frames adopt cofferdam enclosing walls, and each steel pipe pile is welded and fixed with the guide frames after being installed.
Further, in the inserting and driving process, two theodolites are used for controlling in two directions without guide frame limit, and the verticality of the lock catch steel pipe pile is ensured.
Further, a clamping plate is arranged at the steel pipe pile lock catch in the piling proceeding direction and used for preventing the steel pipe from moving.
Furthermore, the position of each buckling steel pipe pile needs to be calculated in advance on the guide frame for checking and correcting at any time.
Further, in the third step, when the rock-in depth of the lock catch steel pipe pile is at least 1m, the rock-in depth of the lock catch steel pipe pile is not at least 3m, and the reinforced concrete pile is adopted to replace the steel pipe pile, so that anchor pile construction is carried out.
Further, in the third and fourth steps, the specific construction process includes:
s1, conducting hole construction, wherein the aperture is matched with the outer diameter of the lock catch steel pipe pile, the hole is led to at least 3m below a bearing platform, a sand sucking machine is utilized to suck the silt, and after the silt sucking is completed, the lock catch steel pipe pile with the diameter of 820 mm is inserted;
s2, pouring back cover concrete, wherein the height of the back cover concrete is equal to the lower part of the bearing platform;
s3, backfilling sand in the holes, and grouting, wherein the grouting height is higher than the upper part of the bearing platform;
s4, when the water level is below +14.5m, installing a first enclosing wall;
s5, when water is pumped to the water level of +11.0, installing a second enclosing wall;
s6, installing a third enclosing wall when pumping water to the surface of the river bed, and installing a fourth enclosing wall when excavating a foundation pit to +4.0;
s7, excavating a foundation pit, and pouring a first layer of concrete;
and S8, removing the fourth enclosing, and pouring the second layer of the bearing platform.
Further, the reaming bit includes the inside fixed drilling rod of reaming bit and reaming bit, the bottom and the limit baffle of fixed drilling rod are connected, limit baffle's below is equipped with the drilling rod sleeve, the telescopic inside of drilling rod sleeve is equipped with flexible drilling rod, the bottom of the telescopic end of flexible drilling rod is connected with the chassis after stretching out from the telescopic bottom of drilling rod, telescopic lower limb department of drilling rod is equipped with two at least upper links, upper links are articulated with well connecting rod and lower connecting rod in proper order, the lower tip of lower connecting rod is articulated with the flexible end of chassis or flexible drilling rod, the outside of upper connecting rod and lower connecting rod all is equipped with the last tooth of boring of a plurality of equipartition, the bottom of chassis is equipped with the tooth of boring down of a plurality of equipartition.
Further, an elastic piece is arranged between the limiting baffle and the reaming bit, the elastic piece is sleeved outside the fixed drill rod, and the end parts of the upper side and the lower side of the elastic piece are connected with the outer wall of the elastic piece.
Further, the number of the upper connecting rod, the middle connecting rod and the lower connecting rod is two or four, and when the number of the upper connecting rod, the middle connecting rod and the lower connecting rod is two, the upper connecting rod, the middle connecting rod and the lower connecting rod are symmetrically arranged by taking the telescopic drill rod as an axis; when the number is four, the included angles of the adjacent two upper connecting rods, middle connecting rods or lower connecting rods are 90 degrees.
Compared with the prior art, the invention has the beneficial effects that:
the invention relates to a construction method of a lock catch steel pipe pile combining a hole guiding and reaming, which comprises the steps of erecting a construction platform, reserving a lock catch steel pipe pile position, drilling in the lock catch steel pipe pile position by using a rotary drilling rig, mounting and inserting a single steel pipe at the lock catch steel pipe pile position by adopting a crawler crane and a vibrating hammer one by one, inserting and beating until no sinking occurs, folding after manufacturing a guide frame, drilling a hole in the lock catch steel pipe pile by adopting rotary drilling after closure, continuing to guide the hole by using a reaming bit, and circulating the operation until the steel pipe pile is up to a designed elevation;
according to the construction method for the lock catch steel pipe pile with the combination of the hole guiding and the hole expanding, when the steel pipe pile is inserted and sunk in a rock hard rock layer and blocked, hole expanding and drilling can be adopted to continue to conduct hole guiding construction at the bottom of the steel pipe, the steel pipe pile can be enabled to follow up and sink for many times until the design elevation is achieved, and the construction difficulty of the lock catch steel pipe pile cofferdam in deep water bare rock and hard rock areas is solved;
the construction method of the lock catch steel pipe pile combining the hole guiding and the reaming has the advantages of high construction speed, convenient and flexible manufacture, processing and installation sinking, simple process, less required equipment, reliable structural stability and convenient operation, and the reaming type drill bit used can be repeatedly used, is more economical and practical, and is beneficial to reducing the construction cost.
Drawings
FIG. 1 is a plan layout view of a construction platform for a locked steel pipe pile in an embodiment of the present invention;
FIG. 2 is a side view of a locked steel pipe pile according to an embodiment of the present invention;
FIG. 3 is a plan view of a locked steel pipe pile according to an embodiment of the present invention;
FIG. 4 is a first construction step diagram of a locked steel pipe pile platform according to an embodiment of the present invention;
FIG. 5 is a second construction step of the locked steel pipe pile platform according to the embodiment of the present invention;
fig. 6 is a third construction step diagram of the locking steel pipe pile platform according to the embodiment of the present invention;
fig. 7 is a fourth construction step diagram of the locking steel pipe pile platform according to the embodiment of the present invention;
fig. 8 is a fifth construction step diagram of the locking steel pipe pile platform according to the embodiment of the present invention;
FIG. 9 is a sixth construction step of the locked steel pipe pile platform according to the embodiment of the present invention;
FIG. 10 is a seventh construction step of the locked steel pipe pile platform according to the embodiment of the present invention;
FIG. 11 is a diagram eighth construction step of a locked steel pipe pile platform according to an embodiment of the present invention;
FIG. 12 is a perspective view of a deep water hole-enlarging drill bit according to an embodiment of the invention;
FIG. 13 is a side view of a deep water hole-enlarging drill bit in accordance with an embodiment of the invention.
Reference numerals illustrate:
1. reaming bit; 2. an elastic member; 3. fixing a drill rod; 4. a limit baffle; 5. a drill pipe sleeve; 6. a middle connecting rod; 7. drilling teeth; 8. a lower connecting rod; 9. a telescopic drill rod; 10. a chassis; 11. setting down the drill teeth; 12. and an upper connecting rod.
Detailed Description
In the description of the present invention, it should be noted that terms such as "upper", "lower", "front", "rear", "left", "right", and the like in the embodiments indicate terms of orientation, and only for simplifying the description based on the positional relationship of the drawings in the specification, do not represent that the elements and devices and the like referred to must be operated according to the specific orientation and the defined operations and methods, configurations in the specification, and such orientation terms do not constitute limitations of the present invention.
In the description of the present invention, it should be noted that the terms "first," "second," and "third" mentioned in the embodiments of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", or a third "may explicitly or implicitly include one or more such feature.
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
The specific embodiment I is as follows: referring to fig. 1 to 11, the invention provides a construction method of a locking steel pipe pile by combining a hole guiding and reaming, which comprises the following steps:
step one, inserting and driving a lock catch steel pipe pile; firstly, building a construction platform, and reserving the position of the lock catch steel pipe pile when the construction platform is built; drilling holes in the positions of the lock catch steel pipe piles by using a rotary drilling rig, and performing single-root installation and insertion drilling on the lock catch steel pipe piles by adopting a crawler crane and a vibrating hammer until the lock catch steel pipe piles are no longer sunk;
in order to ensure accurate pile sinking position during construction of the lock catch steel pipe piles, a steel platform and a steel pipe pile of a trestle are used as guide frames, the guide frames adopt cofferdam walls, and each steel pipe pile is welded and fixed with the guide frames after being installed;
in the inserting and driving process, in order to ensure the verticality of the lock catch steel pipe pile, two theodolites are used for controlling in two directions without limit of a guide frame; in order to prevent the lock catch center line from plane displacement, a clamping plate is arranged at the lock catch of the steel pipe pile in the piling proceeding direction to prevent the steel pipe from displacement; meanwhile, the position of each lock catch steel pipe pile is calculated in advance on the guide frame so as to be checked and corrected at any time;
step two, closure of the cofferdam; the inserting and driving sequence is that two sides are firstly constructed, then the upstream (6-8 lock catch steel pipe piles are reserved) is closed at the corner piles, finally the upstream reserved ports are synchronously closed, when the lock catch steel pipe piles are closed, the lock catch steel pipe piles of the closed ports are independently manufactured according to the field size, and the locking type steel pipe piles are adopted for closing;
step three, hole guiding and reaming construction; after the cofferdam is closed, fixing the cofferdam and the guide frame is reinforced, and in order to strengthen the stability of the lock catch steel pipe piles, hole guiding and hole expanding anchor pile construction are carried out on all the lock catch steel pipe piles;
the anchor pile construction process comprises the steps of firstly adopting a rotary drilling drill to construct a pilot hole in the lock catch steel pipe pile, and then adopting a vibration hammer to perform inserting and beating until the inserting and beating is not sinking any more after the pilot hole reaches at least 3m in the rock stratum; if the rock entering depth does not meet the requirement, reaming the lock catch steel pipe pile by using a reaming bit, and then guiding the hole for construction after reaming, and circulating the above operation until the design elevation is followed;
when the rock-in depth of the lock catch steel pipe pile is at least 1m and the rock-in depth of the lock catch steel pipe pile is not at least 3m, adopting a reinforced concrete pile to replace the steel pipe pile, and carrying out anchor pile construction;
and fourthly, after the anchor pile is constructed, grouting construction is carried out on the outer side of the cofferdam, then a high-power water pump is adopted in the cofferdam, the enclosing wall is installed again after the water pump is adopted for forming a stable inner supporting structure, and after the construction, foundation pit excavation, pile head chiseling and cushion layer pouring are carried out in the cofferdam.
Preferably, in the third and fourth steps, the specific construction process includes:
s1, conducting hole construction, wherein the aperture is matched with the outer diameter of the lock catch steel pipe pile, the hole is led to at least 3m below a bearing platform, a sand sucking machine is utilized to suck the silt, and after the silt sucking is completed, the lock catch steel pipe pile with the diameter of 820 mm is inserted;
s2, pouring back cover concrete, wherein the height of the back cover concrete is equal to the lower part of the bearing platform;
s3, backfilling sand in the holes, and grouting, wherein the grouting height is higher than the upper part of the bearing platform;
s4, when the water level is below +14.5m, installing a first enclosing wall;
s5, when water is pumped to the water level of +11.0, installing a second enclosing wall;
s6, installing a third enclosing wall when pumping water to the surface of the river bed, and installing a fourth enclosing wall when excavating a foundation pit to +4.0;
s7, excavating a foundation pit, and pouring a first layer of concrete;
and S8, removing the fourth enclosing, and pouring the second layer of the bearing platform.
Preferably, as shown in fig. 12 and 13, the reaming bit includes a reaming bit 1 and a fixed drill rod 3 inside the reaming bit 1, the bottom of the fixed drill rod 3 is connected with a limit baffle 4, a drill rod sleeve 5 is arranged below the limit baffle 4, a telescopic drill rod 9 is arranged inside the drill rod sleeve 5, a chassis 10 is arranged at the bottom of a telescopic end of the telescopic drill rod 9, at least two upper connecting rods 12 are arranged at the lower edge of the drill rod sleeve 5, the upper connecting rods 12 are sequentially hinged with a middle connecting rod 6 and a lower connecting rod 8, the lower end part of the lower connecting rod 8 is hinged with the chassis 10 or the telescopic end of the telescopic drill rod 9, a plurality of uniformly distributed upper drill teeth 7 are arranged on the outer sides of the upper connecting rods 12 and the lower connecting rod 8, and a plurality of uniformly distributed lower drill teeth 11 are arranged at the bottom of the chassis 10.
When the device is used in an initial state, the middle connecting rod 6 is parallel to the telescopic drill rod 9; when in a reaming state, the telescopic end of the telescopic drill rod 9 is retracted, the middle connecting rod 6 and the lower connecting rod 8 are driven to fold to form a drill bit larger than the diameter of the reaming bit 1, the drill bit in an initial state is convenient to penetrate into the steel pipe pile, after the drill bit reaches the bottom, the diameter of the drill bit is expanded through the telescopic drill rod 9, drilling is carried out, and after the drilling is finished, the drill bit can be retracted and then taken out from the steel pipe pile. The drill bit is arranged into a retractable structure, so that the inside of the steel pipe is not damaged, the diameter of the drill bit can be adjusted according to the construction condition, and accurate construction can be realized. For the complicated condition of geology or stratum, utilize the reaming formula drill bit to ream the steel-pipe pile, solved the difficult anchor pile's of special geology problem, and for using concrete pile, the efficiency of construction is higher, and the steel-pipe pile structure steadiness is better.
Preferably, an elastic piece 2 is arranged between the limit baffle 4 and the reaming bit 1, the elastic piece 2 is sleeved outside the fixed drill rod 3, and the upper end and the lower end of the elastic piece 2 are both connected with the outer wall of the elastic piece 2. The elastic member 2 plays a certain role in buffering and vibration prevention, and abrasion may be caused during use. The elastic element 2 can be a spring, and the spring is in an extending state in an initial state; the spring may be compressed when reaming.
Preferably, the number of the upper connecting rod 12, the middle connecting rod 6 and the lower connecting rod 8 is two or four, and when the number is two, the upper connecting rod 12, the middle connecting rod 6 and the lower connecting rod 8 are symmetrically arranged by taking the telescopic drill rod 9 as an axis; when the number is four, the included angles of the adjacent two upper connecting rods 12, middle connecting rods 6 or lower connecting rods 8 are 90 degrees.
Preferably, the upper drilling teeth 7 on the middle connecting rod 6 and the lower connecting rod 8 are obliquely arranged, and the upper drilling teeth 7 on the middle connecting rod 6 and the lower connecting rod 8 on the same side are oriented at the same angle, and the upper drilling teeth 7 on the middle connecting rod 6 and the lower connecting rod 8 on the adjacent two sides are oriented oppositely.
Preferably, the drill-down teeth 11 on the chassis 10 are hook-shaped and uniformly distributed at the outer side edge of the chassis 10.
Although the present disclosure is disclosed above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and such changes and modifications would be within the scope of the disclosure.
Claims (10)
1. The construction method of the lock catch steel pipe pile combining the hole guiding and the reaming is characterized by comprising the following steps of:
step one, inserting and driving a lock catch steel pipe pile; firstly, building a construction platform, and reserving the position of the lock catch steel pipe pile when the construction platform is built; drilling holes in the positions of the lock catch steel pipe piles by using a rotary drilling rig, and performing single-root installation and insertion drilling on the lock catch steel pipe piles by adopting a crawler crane and a vibrating hammer until the lock catch steel pipe piles are no longer sunk;
step two, closure of the cofferdam; the inserting and driving sequence is that two sides are firstly constructed, then the upstream is closed at the corner piles, and finally the upstream reserved port is closed synchronously;
step three, hole guiding and reaming construction; after closure of the cofferdam, carrying out hole guiding and hole expanding anchor pile construction on all the lock catch steel pipe piles, wherein the anchor pile construction process comprises the steps of firstly adopting a rotary drilling drill to carry out hole guiding construction in the lock catch steel pipe piles, and then adopting a vibration hammer to carry out insertion and beating until the insertion and beating are not sinking any more after the hole guiding is at least 3m in the rock stratum; if the rock entering depth does not meet the requirement, reaming the lock catch steel pipe pile by using a reaming bit, and then guiding the hole for construction after reaming, and circulating the above operation until the design elevation is followed;
and fourthly, grouting construction is carried out on the outer side of the cofferdam after the anchor pile is constructed, pumping water is carried out in the cofferdam by adopting a high-power water pump, the enclosing wall is installed again after pumping water, foundation pit excavation is carried out in the cofferdam after installation is completed, pile heads are chiseled off, and cushion layer pouring is carried out.
2. The construction method of the lock catch steel pipe pile combining hole guiding and reaming as claimed in claim 1, wherein the construction method comprises the following steps: in the first step, in order to ensure accurate pile sinking position during construction, steel platforms and trestle steel pipe piles are used as guide frames, the guide frames adopt cofferdam walls, and each steel pipe pile is welded and fixed with the guide frames after being installed.
3. The construction method of the lock catch steel pipe pile combining hole guiding and reaming as claimed in claim 2, wherein the construction method comprises the following steps: in the inserting and driving process, two theodolites are used for controlling in two directions without guide frame limit for guaranteeing the perpendicularity of the lock catch steel pipe pile.
4. The construction method for the lock catch steel pipe pile combining hole guiding and reaming as claimed in claim 3, wherein the construction method comprises the following steps: and a clamping plate is arranged at the steel pipe pile lock catch in the piling proceeding direction and used for preventing the steel pipe from displacing.
5. The construction method for the lock catch steel pipe pile combining hole guiding and reaming as claimed in claim 4, wherein the construction method comprises the following steps: the position of each lock catch steel pipe pile needs to be calculated in advance on the guide frame for checking and correcting at any time.
6. The construction method for the lock catch steel pipe pile combining hole guiding and reaming as claimed in claim 5, wherein the construction method comprises the following steps: in the third step, when the rock-in depth of the lock catch steel pipe pile is at least 1m, the rock-in depth of the lock catch steel pipe pile is less than 3m, and the reinforced concrete pile is adopted to replace the steel pipe pile, so that anchor pile construction is carried out.
7. The construction method of a locked steel pipe pile combining hole guiding and reaming as set forth in claim 6, wherein in the third and fourth steps, the specific construction process comprises:
s1, conducting hole construction, wherein the aperture is matched with the outer diameter of the lock catch steel pipe pile, the hole is led to at least 3m below a bearing platform, a sand sucking machine is utilized to suck the silt, and after the silt sucking is completed, the lock catch steel pipe pile with the diameter of 820 mm is inserted;
s2, pouring back cover concrete, wherein the height of the back cover concrete is equal to the lower part of the bearing platform;
s3, backfilling sand in the holes, and grouting, wherein the grouting height is higher than the upper part of the bearing platform;
s4, when the water level is below +14.5m, installing a first enclosing wall;
s5, when water is pumped to the water level of +11.0, installing a second enclosing wall;
s6, installing a third enclosing wall when pumping water to the surface of the river bed, and installing a fourth enclosing wall when excavating a foundation pit to +4.0;
s7, excavating a foundation pit, and pouring a first layer of concrete;
and S8, removing the fourth enclosing, and pouring the second layer of the bearing platform.
8. The construction method for the lock catch steel pipe pile combining hole guiding and reaming as claimed in claim 7, wherein the construction method comprises the following steps: the reaming type drill bit comprises a reaming bit (1) and a fixed drill rod (3) inside the reaming bit (1), the bottom of the fixed drill rod (3) is connected with a limit baffle (4), a drill rod sleeve (5) is arranged below the limit baffle (4), a telescopic drill rod (9) is arranged inside the drill rod sleeve (5), the bottom of a telescopic end of the telescopic drill rod (9) extends out of the bottom of the drill rod sleeve (5) and then is connected with a chassis (10), at least two upper connecting rods (12) are arranged at the lower edge of the drill rod sleeve (5), the upper connecting rods (12) are sequentially hinged with a middle connecting rod (6) and a lower connecting rod (8), the lower end of the lower connecting rod (8) is hinged with the telescopic end of the chassis (10) or the telescopic end of the telescopic drill rod (8), the outer sides of the upper connecting rods (12) and the lower connecting rods (8) are respectively provided with upper drill teeth (7) uniformly distributed, and the bottom of the chassis (10) is provided with lower drill teeth (11) uniformly distributed by a plurality of pieces.
9. The construction method for the lock catch steel pipe pile combining hole guiding and reaming as claimed in claim 8, wherein the construction method comprises the following steps: an elastic piece (2) is arranged between the limit baffle (4) and the reaming bit (1), the elastic piece (2) is sleeved outside the fixed drill rod (3), and the end parts of the upper side and the lower side of the elastic piece (2) are connected with the outer wall of the elastic piece (2).
10. The construction method for the lock catch steel pipe pile combining hole guiding and reaming as claimed in claim 9, wherein the construction method comprises the following steps: the number of the upper connecting rods (12), the middle connecting rods (6) and the lower connecting rods (8) is two or four, and when the number of the upper connecting rods is two, the upper connecting rods (12), the middle connecting rods (6) and the lower connecting rods (8) are symmetrically arranged by taking the telescopic drill rod (9) as an axis; when the number is four, the included angles of the adjacent two upper connecting rods (12), middle connecting rods (6) or lower connecting rods (8) are 90 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311809938.3A CN117702742A (en) | 2023-12-26 | 2023-12-26 | Construction method for locking buckle steel pipe pile combining hole guiding and reaming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311809938.3A CN117702742A (en) | 2023-12-26 | 2023-12-26 | Construction method for locking buckle steel pipe pile combining hole guiding and reaming |
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| Publication Number | Publication Date |
|---|---|
| CN117702742A true CN117702742A (en) | 2024-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311809938.3A Pending CN117702742A (en) | 2023-12-26 | 2023-12-26 | Construction method for locking buckle steel pipe pile combining hole guiding and reaming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117702742A (en) |
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2023
- 2023-12-26 CN CN202311809938.3A patent/CN117702742A/en active Pending
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