CN111042109A - Pile sinking process for land overlength PHS inclined pile - Google Patents
Pile sinking process for land overlength PHS inclined pile Download PDFInfo
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- CN111042109A CN111042109A CN201911394939.XA CN201911394939A CN111042109A CN 111042109 A CN111042109 A CN 111042109A CN 201911394939 A CN201911394939 A CN 201911394939A CN 111042109 A CN111042109 A CN 111042109A
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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
- E02D5/24—Prefabricated piles
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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
- E02D7/02—Placing by driving
- E02D7/06—Power-driven drivers
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a pile sinking process of a land ultra-long PHS inclined pile, which comprises the following steps: the construction equipment is in place, the piling equipment is assembled and debugged on a construction site, and positioning is carried out according to a construction flow; the pile driver is in place, and the horizontal level of the pile driver and the inclination angle of the pile driver are adjusted; hoisting a pile, namely hoisting the pile to be constructed into a pile-hoisting safety distance range of a pile machine in front of a pile driver by adopting a crane; pile sinking, namely aligning the first section of pile to a pile position, adjusting the inclination angle of a pile frame according to a design scheme, and then clamping and hammering the pile to sink the pile; electrically welding piles, wherein the second pile section and the subsequent pile sections are electrically welded on the first pile section, and the pile is hammered; and (5) sending the pile to the elevation. The scheme provided by the invention can realize the construction of the super-long PHS inclined pile on land, can achieve the design effect and can effectively overcome the problems in the prior art.
Description
Technical Field
The invention relates to a construction process of an inclined pile, in particular to a pile sinking process of an ultralong PHS inclined pile.
Background
Coastal protection projects are an important component of coastal projects. For the purpose of coastal protection, different types of coastal buildings can be built or other coastal protection measures can be taken. The function of the coastal protection project is mainly to prevent beach erosion to stabilize the shoreline and to provide protection to the rear shore portion of the shore or the land fill. The basic facilities for coastal protection include building coastal buildings such as spur dikes, offshore dikes, revetments and seawalls, taking artificial beach sand supplementing measures and the like.
Common standard section forms of the revetment structure are unloading plate type structures of a high pile cap of a front cast-in-situ bored pile and a rear straight pile and an inclined pile. For the inclined pile high pile bearing platform unloading plate type structure, a prefabricated square pile is arranged at the bottom of a bearing platform plate.
In some construction schemes, a prefabricated square pile is arranged at the bottom of a bearing platform plate, the pile type of the prefabricated square pile is selected from PHS500(600) B-type piles, the pile length is 45 meters, 50 meters and 60 meters, and pile sinking construction is required to be carried out according to the inclination of 5:1 or 5.5: 1.
And the existing pile sinking scheme can not realize the inclined pile construction on land aiming at the steel pipe pile with the structure. Therefore, how to carry out inclined pile construction on the PHS500(600) B-type pile with the pile length of 45, 50 and 60 meters on land is a problem which needs to be solved in the field.
Disclosure of Invention
The problem that the existing pile sinking scheme cannot be used for onshore inclined pile construction is solved, and an effective and feasible onshore inclined pile construction scheme is needed.
Therefore, the invention aims to provide a pile sinking process of a land ultra-long PHS inclined pile so as to realize land pile sinking construction of the PHS inclined pile.
In order to achieve the above, the pile sinking process of the land ultra-long PHS inclined pile provided by the invention comprises the following steps:
the construction equipment is in place, the piling equipment is assembled and debugged on a construction site, and positioning is carried out according to a construction flow; the pile driver is in place, and the horizontal level of the pile driver and the inclination angle of the pile driver are adjusted;
hoisting a pile, namely hoisting the pile to be constructed into a pile-hoisting safety distance range of a pile machine in front of a pile driver by adopting a crane;
pile sinking, namely aligning the first section of pile to a pile position, adjusting the inclination angle of a pile frame according to a design scheme, and then clamping and hammering the pile to sink the pile;
electrically welding piles, wherein the second pile section and the subsequent pile sections are electrically welded on the first pile section, and the pile is hammered;
and (5) sending the pile to the elevation.
Further, the construction process also comprises a pile sinking construction preparation step, which comprises
Leveling and compacting a pile driving area field, and excavating a drainage ditch in a construction site pile foundation arrangement neutral position area;
laying steel plates in a pile machine station area to prevent the ground of pile sinking from sinking;
and (5) carrying out measurement and setting-out according to the drawing size, and determining a control level point.
Furthermore, when the electric welding pile is used for pile splicing, the lining ring is welded, and then two reinforcing steel bar heads are welded at the pile end to be used as supports.
Furthermore, before pile feeding, the pile feeding depth is calculated in advance according to the designed elevation of the pile top and the elevation of the rear-view control point of the level gauge, and an obvious mark line of the pile feeding elevation is made on the pile feeding rod.
Furthermore, the pile feeding rod and the pile body are on the same central line during pile feeding, and a pile casing is adopted for supporting during inclined pile feeding.
The scheme provided by the invention can realize the construction of the super-long PHS inclined pile on land, can achieve the design effect and can effectively overcome the problems in the prior art.
Drawings
The invention is further described below in conjunction with the appended drawings and the detailed description.
FIG. 1 is a flow chart of pile sinking for onshore ultra-long PHS batter piles in the embodiment of the invention;
FIG. 2 is a schematic illustration of pile position lofting in an embodiment of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
Referring to fig. 1, it shows the basic flow chart of the construction of sinking the overland super-long PHS batter pile according to the present embodiment.
As can be seen from the figure, the construction process of the overland super-long PHS inclined pile sinking provided by the embodiment mainly comprises the following steps:
(1) measuring and positioning;
(2) the pile driver is in place;
(3) aligning the square pile with the pile position;
(4) adjusting the inclination angle of the pile frame;
(5) clamping and compacting the hammered pile;
(6) adjusting the pile frame to be vertical;
(7) hoisting;
(8) a square pile alignment interface;
(9) pile welding is carried out through electric welding;
(11) hammering the pile again aiming at the pile splicing;
(12) pile feeding, namely protecting the inclined pile feeder by using a pile casing;
(13) and (5) sending the pile to the designed elevation.
The following is a detailed description of the above construction process.
First, preparation for pile sinking construction is carried out
1. Leveling and compacting the pile driving area field, arranging an empty area at a pile foundation of a construction site to excavate a drainage ditch, wherein the upper width is 2m, the lower width is 1m, the depth is 1m, and the arrangement position of the drainage ditch does not influence the in-field access passage and the construction. A main drainage ditch is dug at one side of the construction area, drainage ditches are dug at the other side at intervals of 30 meters and communicated with the main drainage ditch, the main ditch is directly connected with the crossing gate, and accumulated water is directly drained into the crossing river. Meanwhile, the construction site drainage system is kept smooth, surface accumulated water in the site is drained in time, and the site is kept dry and free of accumulated water.
2. And steel plates are laid in the pile machine station area to prevent the ground from sinking when the pile is sunk.
3. Measuring and paying off according to the drawing size, determining a control level point, and lofting a pile position:
1) calculating an approximate pile position according to the lifting amount of 4.6 meters, and marking an angular point on the pile toe with cross-shaped pile position by using lime (as shown in figure 2);
2) two orthogonal base lines are measured and placed at the position of a road at the rear side of the pile sinking area and serve as control standards, namely a front base line and a side base line;
3) an angular point on one side of the pile tip of the batter pile in the pointing direction is taken as a control point, the axis where the angular point is located is determined according to the bent frame spacing of 2 meters, and a theodolite is erected at the intersection point of the front base line and the axis of the point, so that the height of the theodolite is positioned by 4.2 meters.
4) And calculating the pile position offset distance when the pile tip is positioned at the elevation of 4.2 meters, determining the axis of the corner point orthogonal to the side base line according to the distance, erecting a theodolite at the intersection of the axis and the side base line, and positioning the height of the theodolite by 4.2 meters.
5) When the pile tip is positioned at the intersection point of two mutually orthogonal instruments during positioning, the pile can be determined to be positioned at the true pile position when the pile tip is positioned at the height of 4.2 meters.
4. Checking the quality of the PHS pile, arranging the PHS pile near the pile machine according to the requirement, and preventing unqualified piles from entering a construction site; and marking scales on the qualified pile body by using red lines. The specific method is that a line color mark is marked on the first section and the second section of the pile body every 1000mm, a red mark is marked on the third section and the fourth section every 500mm, and a red mark is marked on the part of the pile head of the fourth section, which is two meters away, every 250 mm. And a red mark is marked on the pile feeding rod every 100 mm.
5. Checking pile driver equipment, and measuring and setting the pile feeding depth;
6. the pile pad is matched and arranged when the finished pile enters a field, and the pile pad is well arranged when driving is carried out, so that the pile head is prevented from being broken.
The field stacking process is then as above.
Then, pile sinking construction
1. With the equipment in place
1) And after entering the field, assembling and debugging the pile driving equipment on the construction field, and positioning according to the construction flow.
2) According to the construction process, full-time measuring personnel put pile sites.
3) The pile driver is in place, and the horizontal level of the pile driver and the inclination angle of the pile driver are well adjusted.
2. Hanging pile
1) The pile is hung by adopting hooks at two ends, and a crane is adopted to hoist the pile to be constructed into the pile-taking safety distance range of the pile machine in front of the pile driver.
2) Each set of piles is arranged in a matching way.
3) When the pile is lifted, the pile needs to be lifted lightly, so that the pile is prevented from being bumped, the vibration is reduced, and the pile body is prevented from being cracked.
4) The team performs appearance quality inspection and verification on the placed piles.
5) The crane adopts two-point hoisting to arrange the square piles at proper positions.
6) The crane is matched with the pile cap to feed the pile into the pile cap.
3. Pile sinking
1) When the first section of pile is inserted, the pile head needs to be aligned with the ground pile position marker, and then the front and the back of the pile machine are supported to the ground, so that the stability of the pile machine is ensured. Two winches are arranged on the pile machine, one winch is used for hanging the pile to prevent the pile from sagging, the other winch is used for pulling the square pile to ensure the verticality, and the guide rod is tilted backwards to the angle required by the drawing and can adopt a corresponding angle measurer for measurement.
The angle measuring device is welded into a triangle by angle steel, and the angle is 5:1 and 5.5:1, the long side of the triangle is one meter. Two Weiqi instruments are respectively erected at point positions on the two base lines, and pile sinking can be carried out after construction requirements are met.
2) When pile splicing is carried out on the second section and the subsequent piles, the lining ring is welded, and then two reinforcing steel bar heads are welded at the pile ends to be used as supports, so that the smooth pile splicing is ensured. The angle of the first section of pile needs to be adjusted repeatedly, and the perpendicularity of the pile body is forcibly adjusted by using a pile machine after the pile body is strictly forbidden to penetrate into the soil for three meters.
3) When sinking pile, the guide rod of pile machine, pile feeding rod and pile body should be on the same central line.
4. Pile welding requirements
1) The welding adopts CO2 gas shielded welding, the welding material adopts solid welding wire, before welding the square pile, the mud residue and rust at the joint of the pile are removed, and the surface is cleaned.
2) And stopping continuously sinking the pile when the lower section sinks to 0.5-0.8 m away from the ground, welding the lining ring and two reinforcing steel bar heads on the pile head of the lower section pile, and then hanging the upper section pile.
3) After aligning the upper pile and the lower pile, an angle measuring instrument or a theodolite is used for aligning the angle of the upper pile, and after the requirement is met, rust removal is carried out on the welding seam position if necessary.
4) After the welding seam is welded, a welder knocks off welding slag on the surface of the welding seam to carry out self-checking, and after the self-checking is qualified, the welding seam can be beaten after quality personnel and supervision and management confirm, and the electric welding hidden record is made.
5) And naturally cooling the welding interface after electric welding for at least 10 minutes, and strictly prohibiting water cooling or constructing after welding.
And then, pile feeding is carried out.
1) The pile feeding rod is made of proper materials according to the pile type and the pile feeding depth.
2) Before pile feeding, the pile feeding depth is pre-calculated according to the designed elevation of the pile top and the elevation of the rear-view control point of the level gauge, and an obvious mark line of the pile feeding elevation symbol is made on the pile feeding rod.
3) During pile feeding, the pile feeding rod and the pile body are on the same central line, and when the inclined pile is fed, the inclined pile is suspended in the air due to the consideration of inclination, and a pile casing is required to be used for supporting, so that the three types of piles are prevented from occurring during pile feeding.
4) And controlling the deviation of the designed elevation of the pile top by using a level gauge, wherein the deviation of the elevation of the pile top meets the specification and design requirements.
In the implementation process, when the pile is sunk, the pile hammer, the pile replacement (pile feeding) and the pile body are kept on the same axis; the pads, pads and rams (driven piles) should have sufficient strength and rigidity.
In the implementation process, the perpendicularity control is divided into two steps, wherein in the first step, the perpendicularity of the machine body of the pile machine is observed until the requirement is met; and in the second step, the verticality of the pile is observed by using a theodolite, so that the deviation of the verticality of the first section cannot exceed 1/150, and the verticality of the other sections cannot exceed 1/150. The perpendicularity of the first section of pile needs to be adjusted repeatedly, and the perpendicularity of the pile body is forcibly adjusted by a pile machine after the pile body is strictly forbidden to penetrate into the soil for three meters. (the specification requires that the overall deviation not exceed 1%).
In the construction process of the embodiment, the following hammer stopping standard and treatment mode of the non-arrival pile are adopted:
1) the hammer stopping standard firstly takes the drawing requirements of a design institute as the standard, adopts the control according to elevation as the main part, takes the penetration control as the auxiliary part (the last 10 strokes of the penetration is less than 3mm) and immediately stops the hammer when meeting the following conditions, and researches corresponding countermeasure measures.
2) The hammering frequency of a single pile exceeds 3000 and the last 10 m part is more than 1500;
4) the average penetration degree is less than 3mm by using a diesel hammer to continuously hammer 100mm or 30-50 shots.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A pile sinking process of an overland overlong PHS inclined pile is characterized by comprising the following steps:
the construction equipment is in place, the piling equipment is assembled and debugged on a construction site, and positioning is carried out according to a construction flow; the pile driver is in place, and the horizontal level of the pile driver and the inclination angle of the pile driver are adjusted;
hoisting a pile, namely hoisting the pile to be constructed into a pile-hoisting safety distance range of a pile machine in front of a pile driver by adopting a crane;
pile sinking, namely aligning the first section of pile to a pile position, adjusting the inclination angle of a pile frame according to a design scheme, and then clamping and hammering the pile to sink the pile;
electrically welding piles, wherein the second pile section and the subsequent pile sections are electrically welded on the first pile section, and the pile is hammered;
and (5) sending the pile to the elevation.
2. The pile sinking process of overland super-long PHS inclined pile as claimed in claim 1, wherein the construction process further comprises a pile sinking construction preparation step, comprising
Leveling and compacting a pile driving area field, and excavating a drainage ditch in a construction site pile foundation arrangement neutral position area;
laying steel plates in a pile machine station area to prevent the ground of pile sinking from sinking;
and (5) carrying out measurement and setting-out according to the drawing size, and determining a control level point.
3. The pile sinking process of onshore ultra-long PHS inclined pile as claimed in claim 1, wherein the welding process is performed by welding the lining ring and then welding two reinforcing bars at the pile end for supporting.
4. The pile sinking process of overland super-long PHS inclined pile as claimed in claim 1, wherein before pile feeding, pile feeding depth is pre-calculated according to pile top design elevation and level gauge rear view control point elevation, and obvious pile feeding elevation symbol marking line is made on the pile feeding rod.
5. The pile sinking process of overland super-long PHS inclined pile as claimed in claim 1, wherein the pile feeding rod and the pile body are on the same center line during pile feeding, and the pile feeding of the inclined pile is supported by the pile casing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911394939.XA CN111042109A (en) | 2019-12-30 | 2019-12-30 | Pile sinking process for land overlength PHS inclined pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911394939.XA CN111042109A (en) | 2019-12-30 | 2019-12-30 | Pile sinking process for land overlength PHS inclined pile |
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| CN111042109A true CN111042109A (en) | 2020-04-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113047278A (en) * | 2021-04-09 | 2021-06-29 | 安徽恒坤地基基础工程有限公司 | Method for obliquely piling |
| CN114718085A (en) * | 2022-04-19 | 2022-07-08 | 中铁城建集团第三工程有限公司 | Static pressure inclined PRC (prestressed concrete cylinder pipe) tubular pile support construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113047278A (en) * | 2021-04-09 | 2021-06-29 | 安徽恒坤地基基础工程有限公司 | Method for obliquely piling |
| CN114718085A (en) * | 2022-04-19 | 2022-07-08 | 中铁城建集团第三工程有限公司 | Static pressure inclined PRC (prestressed concrete cylinder pipe) tubular pile support construction method |
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