CN107059872B - Inclined cable pile pulling method and inclined cable pile pulling system - Google Patents
Inclined cable pile pulling method and inclined cable pile pulling system Download PDFInfo
- Publication number
- CN107059872B CN107059872B CN201710214665.6A CN201710214665A CN107059872B CN 107059872 B CN107059872 B CN 107059872B CN 201710214665 A CN201710214665 A CN 201710214665A CN 107059872 B CN107059872 B CN 107059872B
- Authority
- CN
- China
- Prior art keywords
- pile
- anchor
- pulled
- pulling
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/02—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by withdrawing
Landscapes
- Engineering & Computer Science (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)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
本发明涉及一种斜索拔桩方法及斜索拔桩系统，属于水利、公路、铁路、市政、桥梁等工程中桩的撤去技术领域。该斜索拔桩方法包括以下步骤：1）经前处理先使待拔桩的顶部曝露；2）在待拔桩的顶部钻制一定数量的第一、第二锚孔；3）将不同根的锚索材料的一端下放至第一锚孔底部和第二锚孔中，其另一端露出待拔桩顶部；4）向第一、第二锚孔内灌注浆体；5)通过起吊设备拔起待拔桩，在拔桩中，同时通过起吊设备对称或非对称提升固定在第二锚孔内的锚索材料的另一端以拔起待拔桩或使待拔桩横向位移。该斜索拔桩方法及斜索拔桩系统可以更好地满足拔桩提升力的要求，同时倾斜索，不对称提升时，可以得到水平分力，使桩产生水平位移，减小拔桩阻力。
The invention relates to an oblique cable pile pulling method and an oblique cable pile pulling system, belonging to the technical field of pile removal in water conservancy, highway, railway, municipal, bridge and other projects. The method for pulling out a pile with an oblique cable includes the following steps: 1) exposing the top of the pile to be pulled out by pretreatment; 2) drilling a certain number of first and second anchor holes on the top of the pile to be pulled out; 3) connecting different roots One end of the anchor cable material is lowered to the bottom of the first anchor hole and the second anchor hole, and the other end is exposed to the top of the pile to be pulled; 4) Pour slurry into the first and second anchor holes; 5) Through lifting equipment The pile to be pulled is pulled up. During the pulling of the pile, the other end of the anchor cable material fixed in the second anchor hole is lifted symmetrically or asymmetrically by the lifting device to pull up the to-be-pulled pile or to laterally displace the to-be-pulled pile. The oblique cable pile pulling method and the oblique cable pile pulling system can better meet the requirements of the lifting force of the pile pulling, and at the same time, when the inclined cable is lifted asymmetrically, the horizontal component force can be obtained, so that the pile generates horizontal displacement and reduces the pile pulling resistance. .
Description
Technical Field
The invention relates to an inclined cable pile pulling method and an inclined cable pile pulling system, and belongs to the technical field of pile removing in water conservancy, highway, railway, bridge, municipal engineering and other projects.
Background
In the construction of the existing subway tunnel, the whole pile influencing the tunnel construction needs to be lifted to a safe height, and the whole pile influencing the tunnel construction is completely or partially pulled out.
However, according to the knowledge of the applicant, the existing pile pulling technology at home and abroad mainly adopts the following modes:
1) a method of crushing piles by impact and a method of reducing abrasion and pulling out of a full sleeve; the two pile pulling technologies mainly depend on a full casing drilling machine and a large crane, so that the requirements on a construction site are high, the area of the construction site is large, the upper part of the site is not limited by the clear height, and the actual construction environment is difficult to achieve.
2) The method for the static pressure pile pulling of the whole casing pipe adopts the steel casing pipe and combines the injection of high-pressure water and high-pressure bentonite slurry to clear the soil mass around the pile and then carries out pile pulling, but the process is more complicated and longer in practice, and the method is not suitable for pulling out a plurality of piles which are adjacent to each other.
3) The pile head reinforcing steel bar in the cast-in-place pile is directly connected with the pile pulling device, and force is gradually applied until the pile is pulled out, but the reinforcing steel bar in the existing cast-in-place pile has low strength, unreliable welding and uneven stress, and the cast-in-place pile is easily pulled out, which is not allowed in pile pulling construction.
At the same time, to the applicant's knowledge, existing pile perimeter drag reduction: due to the influence of the pulling capacity, friction between the periphery of the pile and the soil layer needs to be partially eliminated, and the friction around the pile is eliminated by using a full sleeve or flushing.
Therefore, in the existing pile pulling technology, the resistance elimination at the periphery of the pile and the investment of pulling equipment are large, the construction process is complex, and the construction time is long.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides an inclined cable pile pulling method and an inclined cable pile pulling system which can quickly and simply eliminate resistance when piles with different diameters are quickly and safely pulled out.
One of the technical solutions proposed by the present invention to solve the above technical problems is: a method for extracting piles by inclined cables comprises the following steps:
1) exposing the top of a pile to be pulled out through pretreatment, and simultaneously preparing a plurality of high-strength anchor cable materials and hoisting equipment;
2) drilling a first anchor hole extending to the bottom of the pile to be pulled at the top of the pile to be pulled, drilling a second anchor hole obliquely downward to the center line of the pile to be pulled at the left side and the right side of the top of the pile to be pulled or drilling a second anchor hole vertically downward at the left side and the right side of the top of the pile to be pulled;
3) one end of the anchor cable material is lowered to the bottom of the first anchor hole, and the other end of the anchor cable material is exposed out of the top of the pile to be pulled; one end of the anchor cable material is placed into the second anchor hole, and the other end of the anchor cable material is exposed out of the top of the pile to be pulled;
4) grouting slurry into the first anchor hole and the second anchor hole, fixing the high-strength anchor cable material in the first anchor hole into the pile to be pulled to form a pile pulling anchor rod after the slurry is solidified and reaches a set strength, and fixing the high-strength anchor cable material in the second anchor hole into the pile to be pulled to form a resistance eliminating anchor rod;
5) and lifting the other end of the high-strength anchor cable material fixed in the first anchor by using lifting equipment to pull up the pile to be pulled out, and in the process of pulling up the pile to be pulled out, symmetrically or asymmetrically lifting the other end of the high-strength anchor cable material fixed in the second anchor hole by using the lifting equipment to pull up the pile to be pulled out or enable the pile to be pulled out to transversely displace.
The second technical scheme provided by the invention for solving the technical problems is as follows: an inclined cable pile pulling system is used in the inclined cable pile pulling method, is arranged near a pile to be pulled which is fixed in a soil body and exposed at the top, and comprises a plurality of high-strength anchor cable materials and lifting equipment, and is characterized in that a first anchor hole extending towards the bottom of the pile to be pulled is formed in the top of the pile to be pulled, second anchor holes inclining downwards to the central line of the pile to be pulled or vertically downwards second anchor holes are formed in the left side and the right side of the top of the pile to be pulled, one end of the anchor cable material is arranged in each of the bottom of the first anchor hole and the second anchor hole, the other end of the anchor cable material is exposed out of the top of the pile to be pulled, solidified anchor cable materials in the first anchor hole and the second anchor hole are fixed in the pile to be pulled to form a pile pulling anchor rod and resistance eliminating anchor rod slurry, and the lifting equipment is used for lifting the other end of the anchor cable material fixed in the first anchor to play a role of the pile to be pulled, And the lifting device is used for symmetrically or asymmetrically lifting the other end of the high-strength anchor cable material fixed in the second anchor hole so as to pull up the pile to be pulled or enable the pile to be pulled to transversely displace.
The invention directly drills a first anchor hole and a second anchor hole at the top of a pile to be pulled, then one end of anchor cable materials with different roots is put into the first anchor hole and the second anchor hole, then grout is poured into the first anchor hole and the second anchor hole, the anchor cable materials in the first anchor hole are fixed in the pile to be pulled to form a pile pulling anchor rod, the anchor cable materials in the second anchor hole are fixed in the pile to be pulled to form a resistance eliminating anchor rod, finally the other end of the high-strength anchor cable materials fixed in the first anchor is lifted by lifting equipment to pull the pile to be pulled, in the pile pulling process, the other end of the high-strength anchor cable materials fixed in the second anchor hole is symmetrically lifted by the lifting equipment to pull the pile to be pulled, so that the pile pulling can obtain larger lifting force, the other end of the high-strength anchor cable materials fixed in the second anchor hole is lifted asymmetrically to cause the pile to be pulled to displace transversely, and horizontal component force can be obtained, and form the horizontal displacement of pile top, this has the following effect:
1) the anchor rod in the existing rock-soil anchoring technology is ingeniously moved into the pile pulling, compared with the traditional pile pulling thought trend that the outer surface of the pile is fixed and then lifted, the method breaks through the thought trend, and the pile to be pulled is anchored after the hole is drilled and then pulled, so that the anchoring and pulling are carried out firstly, and therefore the effect of anchoring and pulling are quite unexpected. The pile pulling device can anchor and lift piles to be pulled out with different diameters (large, medium and small), and can reinforce the piles to be pulled out, so that pile breakage in pile pulling can be effectively prevented, the large-diameter piles can be quickly and safely pulled out, the pile pulling device is particularly suitable for pulling out a plurality of piles which are adjacent to each other in a small space, the whole pile pulling device is very reliable and stable, the safety is greatly improved, a large amount of cost is saved, and the efficiency is improved;
2) when the diameter of the pile to be pulled is smaller and a plurality of anchor cable materials are needed, lifting equipment, such as a lifting jack, cannot be completely and vertically arranged, can supplement vertical force through the second anchor hole to achieve sufficient lifting force;
3) if the pile to be pulled is an inclined pile, the pulling force consistent with the axial line of the pile to be pulled can be realized through the second anchor hole;
4) in the process of pulling up the pile to be pulled out, the other end of the anchor cable material in the second anchor hole is lifted by the lifting equipment to pull up the pile to be pulled out, the inclined cable and the straight cable can be used simultaneously, so that the pile can be pulled out to obtain larger lifting force; the other end of the anchor cable material in the second anchor hole is lifted discontinuously through the lifting equipment so that the pile to be pulled forms transverse movement, horizontal component force is obtained through the anchor cable material in the second anchor hole, the connection between the torn part of the pile to be pulled and the periphery is achieved, and pile periphery resistance elimination can be carried out during pile pulling; the pile pulling device is suitable for the working conditions that constraint conditions on two sides of a pile are inconsistent, one side of the pile is strong, and one side of the pile is weak, and can pull the pile to the weak side, so that the lifting force requirement is reduced, and the pile body lifting success rate is improved.
The improvement of one of the above technical schemes is as follows: in the step 2), drilling a static blast hole extending to the bottom of the pile to be pulled at the top of the pile to be pulled; in the step 5), after the pile to be pulled out is pulled out, firstly, a crushing agent is poured into the static blast hole, the orifice of the static blast hole is blocked by quick-hardening cement for 12-18 hours, and then the pile body is crushed by crushing equipment.
The effect of the invention adopting the technical scheme is as follows: the static blast hole extending to the bottom of the pile to be pulled is drilled at the top of the pile to be pulled, so that after the pile is pulled, a crushing agent is poured into the static blast hole and rapid-hardening cement is used for blocking the hole opening of the static blast hole for 12-18 hours, then the pile body is crushed by crushing equipment, concrete can be rapidly decomposed by combining methods of concrete cutting, steel bar gas cutting and the like, the upper part of the pile is detached, and the pile pulling project is smoothly turned to the next process and the next pile.
One of the perfections of the technical scheme is as follows: in the step 1), a working platform is arranged on other piles near the pile to be pulled or on soil around the pile to be pulled; in the step 5), the hoisting equipment is a punching jack, a crane or a winch which is arranged on the working platform, and the punching jack is fixedly arranged on the working platform through a reaction frame.
The effect of the invention adopting the technical scheme is as follows: the working platform is arranged on other piles near the pile to be pulled or on the soil body around the pile to be pulled, and the lifting equipment adopts the center-penetrating jack, the crane or the winch arranged on the working platform, so that the pile to be pulled can be continuously pulled through the lifting equipment, and the whole structure is simple and reliable.
One improvement of the perfection of one of the technical schemes is as follows: the penetrating jack is a pile pulling penetrating jack fixed on the reaction frame and a left and right resistance eliminating penetrating jack, and the left and right resistance eliminating penetrating jacks are arranged on two sides of the pile pulling penetrating jack; in the step 5), the pile pulling penetrating jack simultaneously or discontinuously pulls and fixes the other end of the high-strength anchor cable material in the first anchor to continuously pull up the pile to be pulled, and the left and right resistance-eliminating penetrating jacks simultaneously and symmetrically or asymmetrically lift up the other end of the high-strength anchor cable material fixed in the second anchor hole to pull up the pile to be pulled or enable the pile to be pulled to transversely displace.
The effect of the invention adopting the technical scheme is as follows: the pile pulling device comprises a pile pulling penetrating jack, a left resistance removing penetrating jack, a right resistance removing penetrating jack, a left anchor hole, a right anchor hole, a left anchor rod, a right anchor rod, a left anchor rod, a right anchor rod, a left anchor rod and a right anchor rod.
One improvement of the perfection of one of the technical schemes is as follows: the working platform is a reinforced concrete platform, a steel structure frame platform or a combined structure platform; the center-penetrating jack is fixedly arranged on the reinforced concrete platform, the steel structure frame platform or the combined structure platform through a reaction frame; the crane or the winch is arranged on the reinforced concrete platform, the steel structure frame platform or the combined structure platform.
One improvement of the perfection of one of the technical schemes is as follows: the pile pulling core penetrating jack is vertically and downwards fixed on the reaction frame, and the left and right resistance eliminating core penetrating jacks are respectively and obliquely fixed on the reaction frame left and right.
The second improvement of the first technical scheme is as follows: the depth of the first anchor hole and the length of the anchor rod are smaller than the length of the pile to be pulled and larger than the minimum anchoring length of the anchor rod, and the minimum anchoring length L of the anchor rod is calculated according to the following formula:
in the formula, a is a safety factor; sigma is the strength of the anchor cable material; a is the cross-sectional area of the anchor cable material; d is the anchor eye diameter; tau is the shear strength of the anchor rod and the hole wall.
The third perfection of one of the technical schemes is as follows: the anchor cable material is provided with three grouting pipes of which the outlets are respectively positioned at the bottom, the middle part and the upper part of the first anchor hole or the second anchor hole; grouting slurry into the first anchor hole or the second anchor hole by adopting pressure grouting, wherein the slurry is formed by mixing PO52.5 cement, a cement slurry pore canal grouting agent and water, and the water-cement ratio of the slurry is 0.35-0.45; and (5) performing pressure grouting by adopting a mortar stirrer and a grouting pump.
The second improvement of the above technical scheme is: a static blast hole extending towards the bottom of the pile to be pulled is formed in the top of the pile to be pulled; and a crushing agent is poured into the static blasting hole and a rapid hardening cement block is blocked.
The second technical proposal is further improved as follows: a working platform is arranged on other piles near the pile to be pulled or on a soil body around the pile to be pulled, the hoisting equipment is a penetrating jack arranged on the working platform, the penetrating jack is a pile pulling penetrating jack fixed on the reaction frame and a left and a right resistance-eliminating penetrating jacks, and the left and the right resistance-eliminating penetrating jacks are arranged on two sides of the pile pulling penetrating jack; the pile pulling penetrating jack is used for simultaneously or discontinuously tensioning and fixing the other end of the high-strength anchor rope material in the first anchor so as to continuously pull up the pile to be pulled out, and the left and right resistance-eliminating penetrating jacks are used for simultaneously and symmetrically or asymmetrically lifting the other end of the high-strength anchor rope material fixed in the second anchor hole so as to pull up the pile to be pulled out or enable the pile to be pulled out to transversely displace.
The other end of the high-strength anchor cable material fixed in the first anchor is simultaneously or discontinuously tensioned through the pile pulling penetrating jack to continuously pull up the pile to be pulled up, the other end of the anchor cable material fixed in the second anchor hole is symmetrically lifted up through the left and right resistance-removing penetrating jacks to pull up the pile to be pulled up, so that the pile pulling can obtain larger lifting force, the other end of the anchor cable material fixed in the second anchor hole is symmetrically lifted up to transversely displace the pile to be pulled up, horizontal component force can be obtained, transverse displacement is formed, resistance removal is carried out on one side with strong restraint around the pile, and the whole structure is simple and reliable.
The second technical proposal is further improved as follows: the pile pulling core penetrating jack is vertically and downwards fixed on the reaction frame, and the left and right resistance eliminating core penetrating jacks are respectively and obliquely fixed on the reaction frame left and right.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
fig. 1 is a schematic view of a skew cable pile-pulling method and a pile-pulling device used in the skew cable pile-pulling system according to a first embodiment of the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a schematic view of a first anchor hole, a second anchor hole and a static blast hole drilled in the pile to be pulled in fig. 1.
Detailed Description
Example one
The method for extracting the inclined cable pile, as shown in fig. 1, 2 and 3, comprises the following steps:
1) exposing the top of the pile 1 to be pulled out through reconnaissance and pretreatment, and simultaneously arranging a plurality of high-strength anchor cable materials 2 and lifting equipment;
the pile 1 to be pulled out of the embodiment can be a friction pile buried in soil, a partially rock-socketed end-bearing pile or a secant pile, a bearing platform pile and a driven pile buried at a certain depth below the ground surface, and the like. The head of the friction pile or end-bearing pile is exposed to the ground surface.
The anchor cable material 2 of the present embodiment may be made of a hard or soft metal material. Metal hardwares, such as: a bonded steel strand, a pre-stressed steel strand, a high-strength steel wire rope or a high-strength steel bar, and the like; or non-metallic hard or soft materials, such as: fibers, plastics or nylon, and the like.
2) Drilling a first anchor hole 1-1 extending to the bottom of the pile 1 to be pulled out at the top of the pile and drilling second anchor holes 1-2 obliquely downwards to the center line of the pile 1 to be pulled out at the left side and the right side of the top of the pile. In order to save space, a second anchor hole 1-2 which is vertically downward can be drilled at the left side and the right side of the top of the pile 1 to be pulled, at this time, a vertical hole inclined cable is realized through symmetrical constraint of the top of the pile 1 to be pulled, or a steel strand steering block is arranged at the top of the pile 1 to be pulled to realize the vertical hole inclined cable, and generally, the horizontal component force generated by the normal inclined cable can be borne because the stirrup in the pile 1 to be pulled is stronger.
The first anchor hole 1-1 of the embodiment is a hole located in the center of the cross section of the pile to be pulled 1 or at least two holes uniformly distributed along the circumference of the center of the cross section of the pile to be pulled 1; the second anchor holes 1-2 are at least two holes symmetrically arranged along the central line of the pile to be pulled 1.
In the embodiment, a crawler-type drilling machine D150 is adopted for drilling the first anchor hole 1-1 and the second anchor hole 1-2, and the power of the single drilling machine is 75 kW; meanwhile, 15m3, a 1.3MPa air compressor and 135kW of power of the air compressor are matched. The working efficiency is 60m/8 hr. After drilling, cleaning dry slurry by using clean water, pumping free water, and plugging the hole opening by using a plug before the anchor cable material 2 is put down so as to prevent foreign matters from entering the hole. If the pile 1 to be pulled out is still used as an engineering pile, a geological drilling machine can be adopted for drilling holes in order to avoid the damage of the crawler-type drilling machine to the pile. If the top surface of the pile 1 to be pulled is below the earth surface, the center and the diameter of the pile can be determined through exploration, and the anchor hole is drilled through a casing method.
3) One end of the anchor cable material 2 is lowered to the bottom of the first anchor hole 1-1, and the other end of the anchor cable material is exposed out of the top of the pile 1 to be pulled; one end of the anchor cable material is lowered into the second anchor hole 1-2, and the other end of the anchor cable material is exposed out of the top of the pile 1 to be pulled;
4) grouting slurry into the first anchor hole 1-1 and the second anchor hole 1-2, after the slurry is solidified and reaches a set strength, fixing the high-strength anchor cable material 2 in the first anchor hole 1-1 into the pile-pulling pile 1 to form a pile-pulling anchor rod, and fixing the high-strength anchor cable material 2 in the second anchor hole 1-2 into the pile-pulling pile 1 to form a resistance-eliminating anchor rod;
the depth of the first anchor hole 1-1 and the length of the anchor rod of the embodiment are less than the length of the pile to be pulled 1 and greater than the minimum anchoring length of the anchor rod, and the minimum anchoring length L of the anchor rod is calculated according to the following formula:
in the formula, a is a safety factor; sigma is the strength of the anchor cable material; a is the cross-sectional area of the anchor cable material; d is the anchor eye diameter; tau is the shear strength of the anchor rod and the hole wall.
5) And lifting the other end of the high-strength anchor rope material 2 fixed in the first anchor by using lifting equipment to pull up the pile 1 to be pulled out, and in the process of pulling up the pile 1 to be pulled out, symmetrically or asymmetrically lifting the other end of the high-strength anchor rope material 2 fixed in the second anchor hole 1-2 by using the lifting equipment to pull up the pile 1 to be pulled out or enable the pile 1 to be pulled out to transversely displace.
In the embodiment, in step 1), a working platform 3 is arranged on other piles near the pile 1 to be pulled or on soil around the pile 1 to be pulled.
In order to rapidly decompose the concrete and realize the dismantling of the upper part of the pile 1 to be pulled, and smoothly turn the pile pulling project to the next process and the next pile, in the embodiment, in the step 2), a static blast hole 1-3 extending to the bottom of the pile 1 to be pulled is drilled at the top of the pile.
In the step 5), after the pile 1 to be pulled out is pulled out, firstly, a crushing agent is poured into the static blast hole 1-3, the orifice of the static blast hole 1-3 is blocked by quick-setting cement for 12-18 hours, and then, the pile body is crushed by crushing equipment.
The static blasting holes 1-3 are drilled in advance at the part to be blasted and distributed in a cross shape. The crushing agent is of SCA-2 type (soundless crushing agent), is suitable for 10-25 ℃, is mixed with 1.5 liters of water according to 5 kilograms of crushing agent per bag, and is stirred to ensure that the crushing agent is completely dissolved in the water to form slurry. Pouring the slurry into a static blast hole 1-3 within 10-15 minutes after stirring, filling the static blast hole to a position 15mm away from the hole opening, pouring the slurry into the hole and stirring the slurry in the hole to ensure that no air holes exist in the drilled hole; after filling, plugging the hole opening with quick-hardening cement; the effect can be achieved after 12-18 hours.
In step 5), the hoisting device is a center-penetrating jack disposed on the working platform 3, and the center-penetrating jack is mounted and fixed on the working platform 3 through the reaction frame 4. The working platform 3 is a reinforced concrete platform, a steel structure frame platform or a combined structure platform, and the like; the center-penetrating jack is fixedly arranged on a reinforced concrete platform, a steel structure frame platform or a combined structure platform through a reaction frame 4.
The penetrating jack of the embodiment is a pile pulling penetrating jack 5 fixed on a reaction frame 4, a left resistance eliminating penetrating jack 6 and a right resistance eliminating penetrating jack 7. The left resistance-eliminating penetrating jack 6 and the right resistance-eliminating penetrating jack 7 are respectively arranged at two sides of the pile pulling penetrating jack 5. The pile pulling penetrating jack 5 is vertically and downwards fixed on the reaction frame 4, and the left resistance eliminating penetrating jack 6 and the right resistance eliminating penetrating jack 7 are respectively and obliquely fixed on the reaction frame 4 from left to right.
In order to continuously pull up the pile 1 to be pulled out simply and reliably, in step 5), the pile pulling jack 5 simultaneously or intermittently pulls and pulls the other end of the high-strength anchor cable material 2 fixed in the first anchor so as to continuously pull up the pile 1 to be pulled out. And the left resistance-eliminating penetrating jack 6 and the right resistance-eliminating penetrating jack 7 simultaneously symmetrically or asymmetrically lift the other end of the high-strength anchor cable material 2 fixed in the second anchor hole 1-2 to pull up the pile 1 to be pulled or enable the pile 1 to be pulled to transversely displace.
In order to ensure compact grouting, the anchor cable material 2 of the embodiment is provided with three grouting pipes, the outlets of which are respectively positioned at the bottom, the middle part and the upper part of the first anchor hole 1-1 or the second anchor hole 1-2; grouting slurry into the first anchor hole 1-1 or the second anchor hole 1-2 by adopting pressure grouting, wherein the slurry is formed by mixing PO52.5 cement, a cement slurry pore canal grouting agent and water, and the water-to-glue ratio of the slurry is 0.35-0.45; and (4) performing pressure grouting by adopting a mortar stirrer and a grouting pump, wherein the strength of the slurry is more than 40 MPa. And (3) carrying out a mortar block manufacturing test before grouting to ensure that the 3d strength of the test block reaches 25MPa and the 10d strength reaches 30 MPa.
And (4) performing pressure grouting (pouring the first slurry) by using a mortar stirrer and a grouting pump. And grouting from the bottom to the top, and opening the previous grouting pipe when the grouting pipes are grouted to the previous grouting pipe until the grouting pipes reach the designed position. And 3 groups of cement paste test blocks are manufactured in each grouting process, the cement paste blocks are adopted, the test blocks are pressed in 3d and 7d, and the test blocks can be improved after the strength is achieved.
As shown in fig. 1, 2 and 3, the inclined cable pile pulling system of the present embodiment is used in the above-mentioned inclined cable pile pulling method, and the inclined cable pile pulling system is disposed near a pile 1 to be pulled, which is fixed in a soil body and has an exposed top, and includes a plurality of high-strength anchor cable materials 2 and a hoisting device.
The pile 1 to be pulled out in the inclined cable pile pulling system of the embodiment is also a friction pile, a partially rock-embedded end-bearing pile or an occlusive pile, a bearing platform pile and a driven pile which are buried in the soil body to a certain depth, and the head of the friction pile or the end-bearing pile is exposed on the ground surface.
The anchor cable material 2 in the inclined cable pile pulling system of this embodiment may also be made of a hard or soft metal material, for example: a bonded steel strand, a pre-stressed steel strand, a high-strength steel wire rope or a high-strength steel bar, and the like; or non-metallic hard or soft materials, such as: fibers, plastics or nylon, and the like.
The top of the pile 1 to be pulled is provided with a first anchor hole 1-1 extending towards the bottom of the pile, and the left side and the right side of the top of the pile 1 to be pulled are provided with second anchor holes 1-2 which are inclined downwards to the central line of the pile. In order to save space, the left and right sides of the top of the pile 1 to be pulled can be provided with second anchor holes 1-2 which are vertically downward, at this time, the top of the pile 1 to be pulled is symmetrically restrained to realize a vertical hole inclined cable, or the top of the pile 1 to be pulled is provided with a steel strand steering block to realize a vertical hole inclined cable, and generally, the stirrup in the pile 1 to be pulled can bear the horizontal component force generated by the normal inclined cable.
One end of an anchor rope material 2 is arranged at the bottom of the first anchor hole 1-1 and one end of the anchor rope material 2 is arranged in the second anchor hole 1-2, the other end of the anchor rope material 2 is exposed out of the top of the pile 1 to be pulled, and the anchor rope material 2 in the first anchor hole 1-1 and the second anchor hole 1-2 are respectively filled with slurry which is used for fixing the anchor rope material 2 in the first anchor hole and the second anchor hole in the pile 1 to be pulled after solidification so as to form a pile pulling anchor rod and a resistance eliminating anchor rod.
The depth of the first anchor hole 1-1 and the length of the anchor rod in the inclined cable pile pulling system of the embodiment are also smaller than the length of the pile to be pulled and larger than the minimum anchoring length of the anchor rod, and the minimum anchoring length L of the anchor rod is calculated according to the following formula:
in the formula, a is a safety factor; sigma is the strength of the anchor cable material; a is the cross-sectional area of the anchor cable material; d is the anchor eye diameter; tau is the shear strength of the anchor rod and the hole wall.
The hoisting equipment is used for hoisting the other end of the anchor cable material 2 fixed in the first anchor to pull the pile 1 to be pulled out, and is also used for symmetrically or asymmetrically hoisting the other end of the high-strength anchor cable material 2 fixed in the second anchor hole 1-2 to pull the pile 1 to be pulled out or make the pile 1 to be pulled out move transversely.
The top of the pile to be pulled 1 of the embodiment is provided with a static blast hole 1-3 extending towards the bottom; and a crushing agent is poured into the static blasting holes 1-3, and a rapid hardening cement block is sealed.
In the embodiment, a working platform 3 is arranged on other piles near the pile 1 to be pulled or on soil around the pile 1 to be pulled, the hoisting equipment is a center-penetrating jack arranged on the working platform 3, and the center-penetrating jack is fixedly arranged on the working platform 3 through a reaction frame 4. The working platform 3 is a reinforced concrete platform, a steel structure frame platform or a combined structure platform, and the like; the center-penetrating jack is fixedly arranged on the reinforced concrete platform, the steel structure frame platform or the combined structure platform through the reaction frame.
The penetrating jack of the embodiment is a pile pulling penetrating jack 5 fixed on a reaction frame 4, a left resistance eliminating penetrating jack 6 and a right resistance eliminating penetrating jack 7. The left resistance-eliminating penetrating jack 6 and the right resistance-eliminating penetrating jack 7 are respectively arranged at two sides of the pile pulling penetrating jack 5; the pile pulling and penetrating jack 5 is used for simultaneously or discontinuously tensioning the other end of the high-strength anchor rope material 2 fixed in the first anchor so as to continuously pull up the pile 1 to be pulled. The left resistance-eliminating and penetrating jack 6 and the right resistance-eliminating and penetrating jack 7 are used for symmetrically or asymmetrically lifting the other end of the high-strength anchor cable material 2 fixed in the second anchor hole 1-2 at the same time so as to pull up the pile 1 to be pulled or enable the pile 1 to be pulled to transversely displace.
The pile-pulling through jack 5 of the present embodiment is fixed vertically downward on the reaction frame 4. The left resistance-eliminating punching jack 6 and the right resistance-eliminating punching jack 7 are respectively fixed on the reaction frame 4 in a left-right inclined way.
The anchor cable material 2 of the embodiment is provided with three grouting pipes with outlets respectively positioned at the bottom, the middle part and the upper part of the first anchor hole 1-1 or the second anchor hole 1-2.
Example two
The method for extracting the inclined cable pile in the embodiment is an improvement on the basis of the first embodiment, and is different from the first embodiment in that:
in the embodiment, the total length of the pile to be pulled 1 to be lifted is 24m, the pile diameter is 1500mm, and the pile needs to be lifted to a height of 7-8m, which accounts for 30% of the total length of the pile to be pulled 1, 24 m. Through calculation, the design load of pile pulling force is 8000kN, and the checking load is 10000 kN.
Thus, 4 bundles of CPS15A-12 type shear force dispersion type anchor cables are adopted as the anchor cable material 2. Each CPS15A-14 type shear force dispersion type anchor cable adopts 14-phi 15.24 high-strength and low-relaxation steel stranded wires, and the tensile strength is 1860 MPa.
The lifting equipment of this embodiment still adopts the punch jack, chooses 4 4000kN punch jacks as promoting power equipment, considers according to 0.8 efficiency, and total lifting capacity reaches 12800 kN.
Before paying off, the position of the reaction frame is firstly woven on a terrace, and then the position of the first anchor hole 1-1 is determined according to the deployable position of the reaction frame. The first anchor eye 1-1 of the embodiment is four anchor eyes with centers distributed at four corner points of a square with side lengths of 60cm, the aperture of the first anchor eye 1-1 is 150mm, and the side lengths of the square are respectively parallel to and perpendicular to the crossbeam of the reaction frame.
The pile pulling method comprises the following stages of dividing the estimated lifting force into 10 stages, observing 10 minutes at each stage, measuring data once per minute, and analyzing the relation between the displacement of the pile top along with time and the displacement along with load. And simultaneously monitoring the surface settlement displacement, the structural stress and the deformation. The estimated lifting force is 8000kN, and the specific loads are classified into 800kN, 1600kN and 2400kN until the loads are started.
EXAMPLE III
The method for inclined cable pile pulling of the embodiment is an improvement on the basis of the first embodiment and the second embodiment, and is different from the embodiments in that: in step 5), the hoisting device is a crane or a winch disposed on the working platform 3. The crane or the winch is arranged on the reinforced concrete platform, the steel structure frame platform or the combined structure platform.
The present invention is not limited to the above-described embodiments. All technical solutions formed by equivalent substitutions fall within the protection scope of the claims of the present invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710214665.6A CN107059872B (en) | 2017-04-01 | 2017-04-01 | Inclined cable pile pulling method and inclined cable pile pulling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710214665.6A CN107059872B (en) | 2017-04-01 | 2017-04-01 | Inclined cable pile pulling method and inclined cable pile pulling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107059872A CN107059872A (en) | 2017-08-18 |
| CN107059872B true CN107059872B (en) | 2022-06-07 |
Family
ID=59602892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710214665.6A Active CN107059872B (en) | 2017-04-01 | 2017-04-01 | Inclined cable pile pulling method and inclined cable pile pulling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107059872B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108045514B (en) * | 2017-12-08 | 2023-10-20 | 中国铁建港航局集团有限公司 | Fishing device for bridge construction |
| CN108894225B (en) * | 2018-08-28 | 2023-05-26 | 中铁建设集团有限公司 | A pile extractor suitable for slope protection piles of cycle-type steel structures |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101392532A (en) * | 2008-10-24 | 2009-03-25 | 同济大学 | Hydraulic pile puller device |
| CN101525886A (en) * | 2009-01-14 | 2009-09-09 | 关喜才 | Major diameter uplift pile loading test method and device thereof |
| CN101538857A (en) * | 2009-04-10 | 2009-09-23 | 黄河水利委员会河南黄河河务局 | Pile extraction construction method |
| CN101619574A (en) * | 2009-07-28 | 2010-01-06 | 朱奎 | Prestress pulling resistant anchor pile and constructing method thereof |
| CN101644053A (en) * | 2009-09-04 | 2010-02-10 | 凌光荣 | Method for enhancing pulling-resistant and tensile-resistant capability of soft and weak soil layer anchor rod/anchor rope |
| CN105002906A (en) * | 2015-07-28 | 2015-10-28 | 济南轨道交通集团有限公司 | Binding type anchor cable composite pile structure serving as main body structure stand column and construction method thereof |
-
2017
- 2017-04-01 CN CN201710214665.6A patent/CN107059872B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101392532A (en) * | 2008-10-24 | 2009-03-25 | 同济大学 | Hydraulic pile puller device |
| CN101525886A (en) * | 2009-01-14 | 2009-09-09 | 关喜才 | Major diameter uplift pile loading test method and device thereof |
| CN101538857A (en) * | 2009-04-10 | 2009-09-23 | 黄河水利委员会河南黄河河务局 | Pile extraction construction method |
| CN101619574A (en) * | 2009-07-28 | 2010-01-06 | 朱奎 | Prestress pulling resistant anchor pile and constructing method thereof |
| CN101644053A (en) * | 2009-09-04 | 2010-02-10 | 凌光荣 | Method for enhancing pulling-resistant and tensile-resistant capability of soft and weak soil layer anchor rod/anchor rope |
| CN105002906A (en) * | 2015-07-28 | 2015-10-28 | 济南轨道交通集团有限公司 | Binding type anchor cable composite pile structure serving as main body structure stand column and construction method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107059872A (en) | 2017-08-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106320346A (en) | Construction method for supporting deep foundation pit through grouting after pile arrangement and anchor cable mounting | |
| CN104213509B (en) | A kind of cable hoisting anchor cable formula anchorage construction method | |
| WO2023207250A1 (en) | Construction method for rapidly driving trestle steel pipe pile into sloped bare rock | |
| CN102953373B (en) | Quicksand condition For Artificial Excavation Caisson Pile construction | |
| CN110106889A (en) | A kind of deep basal pit perfusion slope protection pile adds cable bolting construction | |
| CN111560962A (en) | Backfill area foundation pit supporting structure and construction method thereof | |
| CN106948347B (en) | Pile pulling method and pile pulling system | |
| CN106638655A (en) | Conical-head tendon body post-tensioning pile foundation and construction process thereof | |
| CN106930296A (en) | A kind of construction method of internal support of foundation pit | |
| CN105862862B (en) | A kind of large diameter pile buries hammer Refloatation method | |
| CN106968252B (en) | Pile pulling recharging method and pile pulling recharging system | |
| CN107059872B (en) | Inclined cable pile pulling method and inclined cable pile pulling system | |
| CN109024721A (en) | A kind of underpinning and improve the method that ability is cut in the bending resistance of existing building rigid foundation | |
| CN205576896U (en) | That can effectively reduce engineering cost takes steel reinforcement cage construction hole stake | |
| CN206928296U (en) | Pile pulling system | |
| CN206902712U (en) | Pile pulling recharge system | |
| CN206902710U (en) | Retaining wall and counter-force open caisson platform pile pulling system | |
| CN111365050B (en) | Anchor cable, anchor cable device, anchor cable manufacturing method and grouting construction method | |
| CN107023008B (en) | Pile pulling method and system for open caisson platform for retaining wall and counterforce | |
| CN206902713U (en) | Oblique cord pile pulling system | |
| CN106958248A (en) | The construction method of pattern foundation pit supporting structure | |
| CN110924401A (en) | Construction foundation pit supporting mode for combined arching and bearing of mixing piles and cast-in-place piles | |
| CN212896321U (en) | Backfill structure of ultra-deep major diameter stake hole | |
| CN113089654B (en) | Construction process of hole digging pile in complex soil layer and steel casing for construction | |
| CN214460568U (en) | A kind of bridge steel pipe support foundation on the rock surface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |