阅读说明：本技术 抗滑桩钢筋笼井外焊接、分级下降的施工方法 (Construction method for welding and descending of anti-slide pile reinforcement cage outside well in grading manner ) 是由 刘彬 曾光辉 孟照蔚 张玮鹏 张石虎 程心意 陈莉 李锐 池泽成 文喜雨 张淑梅 于 2021-07-30 设计创作，主要内容包括：本发明公开了一种抗滑桩钢筋笼井外焊接、分级下降的施工方法。它包括如下步骤,钢筋笼施工前,按照设计要求做好抗滑桩桩井孔口的护壁锁口和护壁,保证护壁锁口顶面的平整度；步骤一：安装脚手架；步骤二：安装抗滑桩钢筋笼下降装置；步骤三：施工第一级钢筋笼；步骤四：钢筋笼分级下降；步骤五：施工下一级钢筋笼；重复步骤三、步骤四,直至完成整个抗滑桩钢筋笼的分级施工以及下降。本发明克服了现有技术采用井下制作安装钢筋笼,需要大型吊装设备,施工困难等缺点；具有施工简便,能有效地降低施工难度、不需要大型吊装设备、并能有效保证钢筋笼施工质量、减少临时占地面积的优点。(The invention discloses a construction method for welding and descending a slide-resistant pile reinforcement cage outside a well in a grading manner. Before the construction of the steel reinforcement cage, a retaining wall locking notch and a retaining wall of a hole opening of an anti-slide pile are manufactured according to design requirements, and the flatness of the top surface of the retaining wall locking notch is ensured; the method comprises the following steps: installing a scaffold; step two: installing an anti-slide pile reinforcement cage descending device; step three: constructing a first-stage reinforcement cage; step four: the steel reinforcement cage descends in grades; step five: constructing a next-stage reinforcement cage; and repeating the third step and the fourth step until the graded construction and the descending of the whole slide-resistant pile reinforcement cage are completed. The invention overcomes the defects that the prior art adopts underground manufacturing and installation of the reinforcement cage, needs large-scale hoisting equipment, is difficult to construct and the like; the method has the advantages of simple construction, capability of effectively reducing the construction difficulty, no need of large-scale hoisting equipment, capability of effectively ensuring the construction quality of the reinforcement cage and reduction of temporary occupied area.)

1. The construction method for welding and descending the anti-slide pile reinforcement cage outside the well is characterized by comprising the following steps: comprises the following steps of (a) carrying out,

before the construction of a steel reinforcement cage, a retaining wall locking notch (4.1) and a retaining wall (4.2) of an orifice of an anti-slide pile well (4) are manufactured according to design requirements, and the flatness of the top surface of the retaining wall locking notch (4.1) is ensured;

the method comprises the following steps: installing a scaffold;

arranging a scaffold (1) at an orifice of the anti-slide pile well (4);

step two: installing a construction bearing platform;

installing a construction bearing platform (5) at the position of the anti-slide pile retaining wall locking notch (4.1); the construction bearing platform (5) is used as a construction bearing platform of the first-stage reinforcement cage;

step three: constructing a first-stage reinforcement cage;

firstly, laying a first row of stirrups (3b) on a construction bearing platform (5), then carrying out welding construction on longitudinal reinforcements (3a) of the slide-resistant pile, and controlling the verticality of the longitudinal reinforcements (3a) through a scaffold (1);

then, carrying out stirrup (3b), wherein the stirrup (3b) is connected with each longitudinal steel bar (3a) by welding; completing the construction of a first-stage reinforcement cage (3.1);

step four: the steel reinforcement cage descends in grades;

installing an anti-slide pile reinforcement cage descending device (2); supporting the finished first-stage reinforcement cage (3.1) by a reinforcement cage descending device (2), and dismantling a construction bearing platform (5) of the first-stage reinforcement cage installed at the position of the anti-slide pile retaining wall locking notch (4.1) in the second step; the first-stage steel reinforcement cage (3.1) is slowly descended along with the slide-resistant pile steel reinforcement cage descending device (2) by adjusting the slide-resistant pile steel reinforcement cage descending device (2); after the anti-slide pile reinforcement cage descending device (2) descends to the lowest point, fixing the reinforcement cage through a construction bearing platform (5) or the anti-slide pile reinforcement cage descending device (2) and using the reinforcement cage as a construction bearing platform for carrying out the next stage of reinforcement cage; dismantling the anti-slide pile reinforcement cage descending device (2);

step five: constructing a second-stage reinforcement cage;

repeating the third step and the fourth step to complete the construction and graded descending of the second-stage reinforcement cage;

step six: and repeating the fifth step until the graded construction and the descending of the whole slide-resistant pile reinforcement cage (3) are completed.

2. The method of claim 1, wherein the method comprises the steps of: the anti-slide pile reinforcement cage descending device (2) comprises a descending support platform (2.1) and a jack (2.2);

the descending supporting platform (2.1) is arranged at the upper end of the jack (2.2).

3. The method of claim 2, wherein the method comprises the steps of: the construction bearing platform (5) is composed of a plurality of I-shaped steel.

4. The method of claim 3, wherein the method comprises the following steps: in the fourth step, when the slide-resistant pile reinforcement cage descending device (2) is installed, a jack (2.2) in an extension state is installed at the position of a retaining wall locking notch (4.1) of the slide-resistant pile, and a descending support platform (2.1) is installed at the top of the jack (2.2).

5. The method of claim 4, wherein the method comprises the following steps: in the fourth step, when the construction bearing platform (5) is dismantled, the length of the jack (2.2) is adjusted to loosen the construction bearing platform (5), and then the construction bearing platform (5) is pulled out.

6. The method of claim 5, wherein the method comprises the steps of: in the fourth step, when the anti-slide pile reinforcement cage descending device (2) is dismantled, firstly, the jack (2.2) is lowered, and the jack (2.2) is lowered to be close to the lowest position; inserting a construction bearing platform (5) along the position of the retaining wall locking notch (4.1) to serve as a construction bearing platform for the next-stage reinforcement cage; then, the jack (2.2) is lowered to the lowest position, the reinforcement cage is completely descended to the upper surface of the construction bearing platform (5), the descending supporting platform (2.1) and the jack (2.2) are drawn out, at the moment, the construction bearing platform (5) is positioned at the top end of the first-stage reinforcement cage (3.1), and the first-stage reinforcement cage (3.1) is fixed on the construction bearing platform (5);

or in the fourth step, when the anti-slide pile reinforcement cage descending device (2) is dismantled, firstly, the jack (2.2) is lowered to the lowest position, and the descending support platform (2.1) which bears the reinforcement cage and descends to the position along the retaining wall locking notch (4.1) is used as a construction bearing platform for the next-stage reinforcement cage; and then, the jack (2.2) is pulled out, at the moment, the descending supporting platform (2.1) is positioned at the top end of the first-stage reinforcement cage (3.1), and the first-stage reinforcement cage (3.1) is fixed on the descending supporting platform (2.1).

Technical Field

The invention relates to the technical field of geotechnical engineering construction, in particular to the field of landslide prevention engineering, and more particularly relates to a construction method for welding and graded descending of an anti-slide pile reinforcement cage outside a well.

Background

In landslide prevention projects, anti-slide piles are often used for retaining landslides. The traditional slide-resistant pile construction process mainly comprises the following two steps: firstly, manufacturing and installing a reinforcement cage inside an anti-slide pile well; and secondly, manufacturing a reinforcement cage outside the pile well, and then hoisting and installing by adopting a crane. During construction according to the first process, due to the fact that the anti-slide pile well is small in space, poor in air circulation and other objective conditions, vertical transportation of people, materials and machines is difficult, construction potential safety hazards exist, and construction quality of a reinforcement cage is difficult to effectively control. When the construction is carried out according to the second process, if the pile length of the slide-resistant pile is very long and the self weight of the steel reinforcement cage is large, a steel reinforcement cage prefabricating field and larger hoisting equipment are correspondingly needed, but landslide prevention engineering construction is often limited by the terrain, an operation surface is difficult to unfold, large hoisting equipment cannot enter the field, and the steel reinforcement cage hoisting construction is difficult to realize or the construction cost is too high.

Therefore, a construction process which is simple in construction, can effectively reduce the construction difficulty, does not need large-scale hoisting equipment and can effectively ensure the construction quality of the reinforcement cage is urgently needed to be developed.

Disclosure of Invention

The invention aims to provide a construction method for welding and descending the anti-slide pile reinforcement cage outside a well, which is simple and convenient to construct, can effectively reduce the construction difficulty, does not need large-scale hoisting equipment, can effectively ensure the construction quality of the reinforcement cage, and reduces the temporary floor area.

In order to achieve the purpose, the technical scheme of the invention is as follows: the construction method for welding and descending the anti-slide pile reinforcement cage outside the well is characterized by comprising the following steps: comprises the following steps of (a) carrying out,

before the construction of the steel reinforcement cage, a retaining wall locking notch and a retaining wall of an opening of an anti-slide pile well are manufactured according to design requirements, and the flatness of the top surface of the retaining wall locking notch is guaranteed;

the method comprises the following steps: installing a scaffold;

arranging a scaffold at the hole of the anti-slide pile;

step two: installing a construction bearing platform;

installing a construction bearing platform at the locking notch of the slide-resistant pile retaining wall; the construction bearing platform is used as a construction bearing platform of the first-stage reinforcement cage;

step three: constructing a first-stage reinforcement cage;

firstly, laying a first row of stirrups on a construction bearing platform, then carrying out welding construction on longitudinal steel bars of the anti-slide pile, and controlling the verticality of the longitudinal steel bars through a scaffold;

then, performing stirrup in the first-stage steel reinforcement cage stage, wherein the stirrup is connected with each longitudinal bar in a welding manner; completing the construction of the first-stage stirrup;

step four: the steel reinforcement cage descends in grades;

installing an anti-slide pile reinforcement cage descending device; supporting the finished first-stage reinforcement cage by a reinforcement cage descending device, and dismantling a construction bearing platform of the first-stage reinforcement cage installed at the position of the anti-slide pile retaining wall locking notch in the second step; the first-stage steel reinforcement cage is slowly descended along with the anti-slide pile steel reinforcement cage descending device by adjusting the anti-slide pile steel reinforcement cage descending device; after the anti-slide pile reinforcement cage descending device descends to the lowest point, fixing the reinforcement cage through a construction bearing platform or the anti-slide pile reinforcement cage descending device, and using the reinforcement cage as a construction bearing platform for the next stage of reinforcement cage; dismantling the anti-slide pile reinforcement cage descending device;

step five: constructing a second-stage reinforcement cage;

repeating the third step and the fourth step to complete the construction and graded descending of the second-stage reinforcement cage;

step six: and repeating the fifth step until the graded construction and descending of the whole slide-resistant pile reinforcement cage are completed.

In the technical scheme, the anti-slide pile reinforcement cage descending device comprises a descending support platform and a jack;

the descending supporting platform is arranged at the upper end of the jack.

In the technical scheme, the construction bearing platform consists of a plurality of I-shaped steel.

In the technical scheme, in the third step, the first row of stirrups is laid on the construction bearing platform, and then the welding construction of the longitudinal steel bars of the slide-resistant pile is carried out.

In the above technical solution, in the fourth step, when the anti-slide pile cage descending device is installed, a jack in an extended state is installed at the lock opening of the retaining wall, and a descending support platform is installed at the top of the jack.

In the technical scheme, in the fourth step, when the construction bearing platform is dismantled, the length of the jack is adjusted to enable the construction bearing platform to be loosened, and then the construction bearing platform is pulled out.

In the technical scheme, in the fourth step, when the anti-slide pile reinforcement cage descending device is dismantled, firstly, the jack is lowered to enable the jack to descend to be close to the lowest position; inserting a construction bearing platform along the position of the retaining wall locking notch to serve as a construction bearing platform for the next-stage reinforcement cage; then, lowering the jack to the lowest position to enable the reinforcement cage to completely descend to the upper surface of the construction bearing platform, and drawing out the descending supporting platform and the jack, wherein the construction bearing platform is located at the top end of the first-stage reinforcement cage, and the first-stage reinforcement cage is fixed on the construction bearing platform;

or in the fourth step, when the anti-slide pile reinforcement cage descending device is dismantled, firstly, the jack is lowered to enable the jack to descend to the lowest position, and the descending support platform which bears the reinforcement cage and descends to the lock hole of the edge protecting wall serves as a construction bearing platform for the next-stage reinforcement cage; and then, the jack is drawn out, at the moment, the descending supporting platform is positioned at the top end of the first-stage reinforcement cage, and the first-stage reinforcement cage is fixed on the descending supporting platform.

The invention has the following advantages:

(1) the method is simple and convenient to construct, can effectively reduce the construction difficulty, does not need large hoisting equipment, can effectively ensure the construction quality of the reinforcement cage, and reduces the temporary floor area;

(2) according to the construction scheme, the manufacturing of the steel reinforcement cage is carried out outside the anti-slide pile well, the operation surface is large, and people, materials and machines do not need to frequently go into and out of the well; the defects that the quality is difficult to control and the construction safety of operating personnel is difficult to guarantee due to the adoption of an underground reinforcement cage for construction in the prior art are overcome; the defects that landslide prevention engineering construction is often limited by terrain, an operation surface is difficult to unfold, large hoisting equipment cannot enter a field, hoisting construction of a reinforcement cage is difficult to realize, or construction cost is too high are avoided;

(3) according to the construction scheme, special ventilation equipment is not needed, the health of operators can be effectively protected, and the engineering cost is saved; the defect that the traditional construction scheme needs to be constructed underground is overcome;

(4) according to the construction scheme, the manufacturing and descending of the reinforcement cage are carried out outside the anti-slide pile well, and the manufacturing of the reinforcement cage can be completed outside the anti-slide pile well on the construction bearing platform made of the I-shaped steel; the descending operation of the reinforcement cage can be completed by adopting a common hydraulic jack and a descending supporting platform, the entering of hoisting equipment is not needed, and the construction site has no great requirement; the defects of large operation surface and large occupied area caused by hoisting construction in the prior art are overcome.

Drawings

Fig. 1 is a schematic structural view of the present invention, which provides a scaffold at an opening of a slide-resistant pile shaft as a reinforcing bar support structure.

Fig. 2 is a schematic structural diagram of the construction bearing platform arranged at the hole opening of the slide-resistant pile well.

Fig. 3 is a schematic structural view of the first-stage reinforcement cage manufacturing on the construction bearing platform according to the present invention.

Fig. 4 is a schematic structural diagram of the present invention in which a descending support platform is disposed on the top of a completed first-stage reinforcement cage, and a jack is disposed at the lower end of the descending support platform.

Fig. 5 is a schematic structural view of the construction bearing platform drawn out after the descending supporting platform and the jack are installed.

Fig. 6 is a schematic view of the arrangement of the slide-resistant pile cage lowering device of the present invention lowered to a position close to the opening of the slide-resistant pile shaft.

Fig. 7 is a schematic structural view of a manufacturing platform for a next-stage reinforcement cage, in which a construction bearing platform is inserted into a descending first-stage reinforcement cage.

Fig. 8 is a schematic structural view of the construction platform in fig. 7, which is disassembled.

Fig. 9 is a schematic structural view of the fabrication of the next-stage reinforcement cage on the construction bearing platform according to the present invention.

In the figure, 1-a scaffold, 1.1-a reinforcement cage longitudinal bar limiting structure, 2-an anti-slide pile reinforcement cage descending device, 2.1-a descending supporting platform, 2.2-a jack, 3-an anti-slide pile reinforcement cage, 3 a-longitudinal bars, 3 b-stirrups, 3.1-a first-stage reinforcement cage, 4-an anti-slide pile well, 4.1-a wall protection locking notch, 4.2-a wall protection and 5-a construction bearing platform.

Detailed Description

The embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be clear and readily understood by the description.

The method is suitable for construction conditions that the slope surface of the slide-resistant pile is complex in terrain and the operation surface is difficult to unfold due to the limitation of the terrain; the anti-slide pile reinforcement cage descending device is adopted to carry out the grading construction outside the reinforcement cage well, the reinforcement cage descends step by step, the welding construction of the reinforcement cage is completely finished outside the well (at the well mouth), the construction quality of the reinforcement cage can be effectively ensured, and the construction potential safety hazard is reduced; the simple descending device does not need large-scale hoisting equipment, does not need a large construction operation surface, and has greater adaptability to terrains.

With reference to the accompanying drawings: the construction method for welding and descending the anti-slide pile reinforcement cage outside the well in a grading way comprises the following steps,

before the construction of the steel reinforcement cage 3, a retaining wall locking notch 4.1 and a retaining wall 4.2 of an orifice of an anti-slide pile well 4 are made according to design requirements, and the flatness of the top surface of the retaining wall locking notch 4.1 is ensured; the flatness of the top surface of the locking opening is controlled during construction, and the verticality of the later reinforcing cage is greatly controlled;

the method comprises the following steps: installing a scaffold;

after the anti-slide pile well is excavated and supported, a scaffold 1 is arranged at the hole opening of the anti-slide pile well 4, a longitudinal reinforcement limiting structure 1.1 of a reinforcement cage is arranged on the scaffold 1, and the scaffold is used as a side supporting structure of the reinforcement cage;

step two: installing a construction bearing platform;

a construction bearing platform 5 which supports the weight of the reinforcement cage, assists the reinforcement cage to descend in a grading manner and serves as a construction platform of the anti-slide pile reinforcement cage is arranged at a position of a retaining wall locking notch 4.1 of the anti-slide pile, and the construction bearing platform 5 serves as a construction bearing platform of a first-stage reinforcement cage; constructing an initial working surface on the construction bearing platform 5;

step three: constructing a first-stage reinforcement cage;

firstly, laying a first row of stirrups 3b on a construction bearing platform 5, then carrying out welding construction on longitudinal reinforcements 3a of the slide-resistant pile, and controlling the verticality of the longitudinal reinforcements 3a through a scaffold 1;

then, the stirrups 3b in the first-stage steel reinforcement cage construction stage are carried out, and the stirrups 3b are ensured to be connected with each longitudinal steel bar 3a through welding; completing the construction of the first-stage reinforcement cage 3.1; the construction height of the first-stage steel reinforcement cage corresponds to the stroke of the anti-slide pile steel reinforcement cage descending device (the manufacturing height of the steel reinforcement cage is preferably 2 m); each row of stirrups should be measured by a leveling rod to ensure the levelness of the stirrups;

step four: the steel reinforcement cage descends in grades;

adjusting the anti-slide pile reinforcement cage descending device 2, supporting the finished first-stage reinforcement cage 3.1 by the reinforcement cage descending device 2, and dismantling the construction bearing platform 5 of the first-stage reinforcement cage arranged at the anti-slide pile protection wall locking notch 4.1 in the second step; the first-stage reinforcement cage 3.1 is enabled to synchronously and slowly descend along with the anti-slide pile reinforcement cage descending device 2 by adjusting the jack 2.2; after the anti-slide pile reinforcement cage descending device 2 descends to the lowest point, fixing the reinforcement cage through the construction bearing platform 5 or the anti-slide pile reinforcement cage descending device 2, and using the reinforcement cage as an operation surface for carrying out the next stage of reinforcement cage; dismantling the anti-slide pile reinforcement cage descending device 2;

step five: constructing a next-stage reinforcement cage;

repeating the third step and the fourth step to complete the construction and the graded descending of the next-stage reinforcement cage;

step six: and repeating the third step and the fourth step until the graded construction and graded descending of the whole slide-resistant pile reinforcement cage 3 are completed and the slide-resistant pile reinforcement cage is installed in place. According to the invention, the anti-slide pile reinforcement cage descending device is used for constructing and descending the reinforcement cage in the anti-slide pile hole opening in a grading manner, so that the construction cost is saved, the construction of the reinforcement cage is carried out outside the anti-slide pile hole, the operation surface is large, the construction quality of the anti-slide pile is ensured, and the anti-slide pile is safe and efficient.

Further, the anti-slide pile cage lowering device 2 comprises a lowering support platform 2.1 and a jack 2.2;

the descending supporting platform 2.1 is arranged at the upper end of the jack 2.2; the descending supporting platform 2.1 and the jack 2.2 work cooperatively; the invention adopts I-shaped steel (namely, the descending supporting platform 2.1) and the jack (or other small hoisting equipment with the effect similar to that of the jack), can effectively reduce the construction difficulty, does not need large hoisting equipment, can effectively ensure the construction quality of the reinforcement cage, reduces the temporary occupied area, further saves the engineering investment to a certain extent, and has safe and efficient construction.

Further, the construction bearing platform 5 is composed of a plurality of I-shaped steel; the construction bearing platform 5 with an I-shaped steel structure is arranged at the position of the locking notch of the slide-resistant pile, and the I-shaped steel is used as the construction bearing platform of the steel reinforcement cage of the slide-resistant pile; the type and the number of the I-shaped steel meet the weight of a reinforcement cage supported in a corresponding construction stage, the number of the I-shaped steel serving as a construction bearing platform of the slide-resistant pile reinforcement cage is more than or equal to 2, the type and the number of the needed I-shaped steel are calculated and determined according to the self weight of the reinforcement cage, the selected I-shaped steel can penetrate through the stirrup of the reinforcement cage, the strength of the I-shaped steel can resist the self weight of the reinforcement cage, and the design safety factor of the selected I-shaped steel is more than or equal to 1.5.

Further, in the fourth step, when the anti-slide pile reinforcement cage descending device 2 is installed, a jack 2.2 in an extending state is installed at the position of a retaining wall locking notch 4.1 of the anti-slide pile, a descending support platform 2.1 is installed at the top of the jack 2.2, and the descending support platform 2.1 is composed of a plurality of I-shaped steel bars; namely, after the first-stage reinforcement cage is manufactured, a descending support bearing platform made of I-shaped steel is installed at the stirrup at the uppermost part of the finished first-stage reinforcement cage, and the descending support bearing platform and the first-stage reinforcement cage are supported by a plurality of jacks (the number of the jacks is calculated according to the weight of the reinforcement cage). The descending supporting platform is used for supporting the reinforcement cage in the descending process of the reinforcement cage, and can be directly used as a new construction bearing platform after the reinforcement cage descends to an operation surface, the next-level reinforcement cage construction operation is carried out on the new construction bearing platform, and the working procedures and the cost are saved.

The construction bearing platform and the descending support platform have the same structure. The descending supporting platform falls to the locking notch of the pile well protecting wall to form a construction bearing platform of the next-stage reinforcement cage; and the I-shaped steel of the construction bearing platform disassembled at the previous stage can be directly used as a descending support platform arranged at the upper end of the jack 2.2 and used for supporting the steel reinforcement cage when the steel reinforcement cage at the next stage is constructed, and the whole anti-slide pile steel reinforcement cage is finally manufactured after the above-mentioned cycle use.

Further, in the fourth step, when the construction bearing platform 5 is dismantled, the extension length of the jack 2.2 is adjusted to loosen the construction bearing platform 5, and then the construction bearing platform 5 is drawn out (namely after the jack is lifted up and lowered by a small amount to support the bearing platform, I-shaped steel of the construction bearing platform is drawn out);

and in the stage of the graded descending of the first-stage reinforcement cage 3.1, synchronously adjusting the descending heights of the jacks 2.2 to ensure the verticality of the reinforcement cage.

Furthermore, in step four, when the anti-slide pile cage lowering device 2 is to be dismantled, the jack 2.2 is first lowered, so that the jack 2.2 is lowered to be close to the lowest position; the first-stage reinforcement cage and the descending support bearing platform synchronously descend; in the descending process, a plurality of jacks at the wellhead descend coordinately and synchronously to ensure that the first-stage reinforcement cage can descend vertically; inserting a construction bearing platform 5 serving as a construction bearing platform for a next-stage reinforcement cage along the position of a retaining wall locking notch 4.1 of the slide-resistant pile; then, the jack 2.2 is lowered to the lowest position, the reinforcement cage is completely lowered onto the construction bearing platform 5, the lowering supporting platform 2.1 and the jack 2.2 are drawn out, at the moment, the construction bearing platform 5 is located at the top end of the first-stage reinforcement cage 3.1, and the first-stage reinforcement cage 3.1 is fixed on the construction bearing platform;

or in the fourth step, when the anti-slide pile reinforcement cage descending device 2 is dismantled, firstly, the jack 2.2 is lowered to the lowest position, and the descending support platform 2.1 which bears the reinforcement cage and descends to the position along the retaining wall locking notch 4.1 is used as a construction bearing platform for the next-stage reinforcement cage; and then, the jack 2.2 is pulled out, at the moment, the descending supporting platform 2.1 is positioned at the top end of the first-stage reinforcement cage 3.1, and the first-stage reinforcement cage 3.1 is fixed on the descending supporting platform 2.1.

Furthermore, in the fifth step, the verticality of the longitudinal reinforcements of the reinforcement cage and the levelness of the stirrups of the reinforcement cage are continuously controlled in the construction of the next-stage reinforcement cage.

In order to more clearly illustrate the advantages of the construction method for welding and descending the slide-resistant pile cage outside the well, compared with the prior art, the two technical schemes are compared by the staff, and the comparison results are as follows:

from the above table, compared with the prior art, the construction method for the anti-slide pile reinforcement cage through the off-hole welding and the grading descending has the advantages that the construction is simple and convenient, the construction difficulty can be effectively reduced, large hoisting equipment is not needed, the construction quality of the reinforcement cage can be effectively ensured, the temporary occupied area is reduced, and the construction method can play a role in ensuring the construction quality of the anti-slide pile, saving the construction cost, and realizing safe and efficient construction under the conditions that landslide prevention engineering is limited by terrain, the operation surface is difficult to expand and the large hoisting equipment cannot enter the field to a certain extent.

Other parts not described belong to the prior art.