阅读说明：本技术 一种转角桩施工方法 (Corner pile construction method ) 是由 刘仁旭 贾志锐 陈维华 周敏 张森 王伟民 席亚冬 郭玉军 胡舒 曹磊 于 2021-07-14 设计创作，主要内容包括：本发明公开了一种转角桩施工方法,属于转角桩施工技术领域；转角桩施工方法包括以下步骤：将转角桩打入一定深度；将转角桩超出标高部分割除；将转角桩拔起；在转角桩底部焊接定位装置；转角桩静压下沉；将转角桩割除部分重新焊接在原处；将转角桩压入设计深度；本发明利用现有振动锤、静压植桩机各自优势,先用振动锤将桩打入较浅深度,满足静压植桩机向前施工,最后静压植桩机再回头二次施工转角桩,将转角桩压入设计深度,在不增加设备的前提下,满足了施工要求,节约成本。(The invention discloses a construction method of a corner pile, belonging to the technical field of corner pile construction; the construction method of the corner pile comprises the following steps: driving the corner pile into a certain depth; cutting off the part of the corner pile, which exceeds the elevation; pulling up the corner pile; welding a positioning device at the bottom of the corner pile; static pressure sinking of the corner pile; re-welding the cut part of the corner pile at the original position; pressing the corner pile into the designed depth; the invention utilizes the respective advantages of the existing vibration hammer and static pressure pile planting machine, firstly uses the vibration hammer to drive the pile into a shallower depth, satisfies the forward construction of the static pressure pile planting machine, finally uses the static pressure pile planting machine to return to construct the corner pile for the second time, presses the corner pile into the designed depth, satisfies the construction requirement on the premise of not increasing equipment, and saves the cost.)

1. A construction method of a corner pile is characterized by comprising the following steps:

s1, driving the corner piles to a certain depth;

s2, cutting off the part of the corner pile, which exceeds the elevation;

s3, pulling up the corner pile;

s4, welding a positioning device at the bottom of the corner pile;

s5, sinking the corner pile by static pressure;

s6, re-welding the cut part of the corner pile in situ;

and S7, pressing the corner piles into the designed depth.

2. The method of constructing a corner pile according to claim 1, wherein a vibration hammer is used to drive the corner pile to a certain depth in S1.

3. The corner pile construction method according to claim 1, wherein four corner piles are provided in the S1.

4. The method of constructing a corner pile according to claim 1, wherein a static pressure pile driver is used to extract the corner pile in S3.

5. The method for constructing a corner pile according to claim 4, wherein the static pressure pile-planting machine in S3 is hoisted to the top of the adjacent corner pile by a crane, and the head of the static pressure pile-planting machine faces the corner pile.

6. The method of constructing a corner post according to claim 1, wherein the corner post in S3 is pulled out and then the bottom is one meter higher than the top of the corner post when the corner post is not pulled out.

Technical Field

The invention relates to the technical field of corner pile construction, in particular to a corner pile construction method.

Background

The steel platform needs to be set up around the bridge position for bridge foundation construction on water, and for saving cost and being convenient for construction, the platform is generally nearer apart from the cushion cap, and the cushion cap cofferdam is under construction between the cushion cap sideline and the platform sideline.

Aiming at the construction of a steel sheet pile cofferdam in a hard stratum such as pebbles and the like, the steel sheet pile inserting and driving construction difficulty is high, the common domestic rotary drilling, guiding and hole drilling pile planting technology is adopted, a guiding hole mode is generally adopted to replace a hard material at a pile position to be a soft filling material, so that the steel sheet pile is conveniently inserted and driven in place, but the guiding hole can disturb a river bed stratum, the problems of cofferdam deflection, foot kicking, water seepage and the like are easily caused, and measures such as hole bottom grouting and the like need to be added. According to the conventional process, the steel sheet pile is high in construction cost, long in construction period and high in construction risk.

For a rectangular cofferdam, the static pressure pile planting machine has a large requirement on the self-turning space, and under the working condition that the construction platform is close to the position of the cofferdam, the self-turning direction of the construction platform in a narrow space cannot be automatically changed, a crane is needed to hoist and assist in changing the direction, and after the direction is hoisted and turned, the static pressure pile planting machine needs 4 piles which are driven to a certain depth to serve as a base of a host machine. Aiming at the corner base pile, the vibration hammer can not drive the corner base steel sheet pile into the designed depth once, the common process is that after the screw machine and the rotary drilling rig are used for leading holes, the vibration hammer drives the base pile into the designed depth, and then the static pressure pile planting machine is hoisted, so that the hole leading equipment needs to be independently led in, but the number of the corner piles is small, and the construction cost of the independent entering hole leading equipment is higher.

Disclosure of Invention

The invention aims to provide a corner pile construction method to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a construction method of a corner pile comprises the following steps:

s1, driving the corner piles to a certain depth;

s2, cutting off the part of the corner pile, which exceeds the elevation;

s3, pulling up the corner pile;

s4, welding a positioning device at the bottom of the corner pile;

s5, sinking the corner pile by static pressure;

s6, re-welding the cut part of the corner pile in situ;

and S7, pressing the corner piles into the designed depth.

As a further scheme of the invention: in S1, the corner pile is driven to a certain depth by using a vibration hammer.

As a further scheme of the invention: the corner piles in the S1 are provided with four.

As a further scheme of the invention: and in the step S3, the static pressure pile planting machine is used for pulling the corner pile.

As a further scheme of the invention: and the static pressure pile planting machine in the S3 is hoisted to the top of the adjacent corner pile through a crane, and the head direction of the static pressure pile planting machine faces the corner pile.

As a further scheme of the invention: and in the S3, the height of the bottom of the pulled corner pile is higher than the elevation by not less than one meter.

Compared with the prior art, the invention has the beneficial effects that: the pile driver utilizes the respective advantages of the existing vibrating hammer and the static pressure pile driver, firstly uses the vibrating hammer to drive the pile into a shallow depth, satisfies the requirement that the static pressure pile driver is constructed forwards, finally uses the static pressure pile driver to drive the pile driver back to construct the corner pile for the second time, presses the corner pile into the designed depth, and satisfies the construction requirement and saves the cost on the premise of not increasing equipment.

Drawings

Fig. 1 is a flowchart of a corner pile construction method.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Example 1

At the construction position of the corner pile, driving four corner piles into a certain shallow depth one by one through a vibration hammer, cutting flat at the elevation position of the designed pile top, and cutting short sections for proper storage; the static pressure pile planting machine is hoisted to the corner pile by a crane, the static pressure pile planting machine completes forward construction, the static pressure pile planting machine is hoisted to the top of the adjacent corner pile by the crane, the machine head faces the corner pile, the static pressure pile planting machine clamps the corner pile and upwards pulls the corner pile until the distance between the bottom of the corner pile and the tops of the corner piles at two sides is about one meter, the pulling process needs to be slow, the lock catches at two sides are ensured not to be loosened, a limiting device is welded at the bottom of the pulled corner pile and then is connected with a spiral drill rod of the static pressure pile planting machine, the static pressure pile planting machine downwards presses the corner pile, after the pile is pressed into a proper position, the originally cut short section part is welded and lengthened, the pile continues to be pressed downwards until the designed elevation, and the construction of the corner pile is completed.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.