CN219908895U - Heel tube cloth bag pile while drilling for beaded karst cave and piling equipment thereof - Google Patents

Abstract

The utility model provides a heel tube cloth bag pile while drilling for a beaded karst cave and piling equipment thereof, wherein the cloth bag pile comprises: the pipe pile comprises a pipe wall, a grouting assembly is pre-embedded in the pipe wall, the pipe pile is of a hollow structure, and a hollow inner cavity is formed in the hollow part; a cloth bag, wherein a groove is formed in the outer side of the pipe wall, and the cloth bag is inlaid in the groove; the grouting assembly corresponds to the cloth bag and the bottom end of the tubular pile. The PHC tubular pile with the pipe cloth bag pile while drilling overcomes the problems of smaller pile diameter and insufficient bearing capacity of the PHC tubular pile by the traditional hammering method or static pressure method, and avoids engineering accidents such as pile breakage, pile body defect, collapse of karst cave roof and the like which are easily caused during tubular pile construction; engineering accidents such as hole collapse, drilling deflection, slurry leakage, drilling sticking and the like which are easy to occur in the cast-in-place pile are avoided, the bearing capacity is high, and the construction cost is low.

Description

Heel tube cloth bag pile while drilling for beaded karst cave and piling equipment thereof

Technical Field

The utility model belongs to the technical field of civil engineering and traffic engineering, and particularly relates to a heel tube cloth bag pile while drilling for a beaded karst cave and piling equipment thereof.

Background

The karst landform is a relatively common bad geological environment in engineering, has the characteristics of wide distribution, large area, strong concealment and the like, and particularly has the advantages of sufficient rainwater in the southern area of China and strong damage and reconstruction effects of underground water on soluble rocks, so that the karst landform in the southern area is extremely developed, and the existence of karst cave has great negative influence on engineering construction. The beaded karst cave is a special karst landform, a series of continuous strings of karst cave like beaded karst cave formed by karst action are provided with a plurality of larger chambers, and the chambers are connected by narrower tunnels, so that engineering accidents are more likely to occur during construction of a beaded karst cave stratum, and the influence of the beaded karst cave on engineering construction is particularly obvious;

the pile foundation is an effective method for bearing the load of the upper structure and reducing the settlement of the foundation, and the karst cave area generally adopts the pile foundation as a foundation form so as to meet the requirement of the upper structure on the high bearing capacity of the foundation. Although the pile end of the pile foundation in the karst region needs to pass through the karst cave to the bottom of the cave and be embedded into the rock stratum to a certain depth in general, the bearing performance of the pile foundation is still greatly reduced due to the existence of the karst cave, particularly the existence of the bead-string type karst cave, so that the pile foundation should avoid the formation containing the karst cave as much as possible when the pile foundation is built in the karst region in general, however, the geological conditions of the karst region are very complex, and the whole information of the karst cave distribution is difficult to reflect by initial exploration means such as drilling and the like, so that the pile foundation is inevitably placed on the karst foundation. Therefore, the heel tube cloth bag pile while drilling for the beaded karst cave and the piling equipment thereof have important engineering application values.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides the heel tube cloth bag pile while drilling for the bead karst cave and the piling equipment thereof, the heel tube cloth bag pile while drilling is suitable for karst areas, in particular for bead karst cave strata, and has the advantages of simple construction process, low construction cost, good safety, simple operation and wide application range, and provides important technical support for solving the bottleneck problem of pile foundation construction of the karst areas and the problem of insufficient bearing performance of pile foundations of the karst areas.

One embodiment of the utility model provides a heel tube cloth bag pile while drilling for a beaded karst cave, which comprises:

the pipe pile comprises a pipe wall, a grouting assembly is pre-embedded in the pipe wall, the pipe pile is of a hollow structure, and a hollow inner cavity is formed in the hollow part;

a cloth bag, wherein a groove is formed in the outer side of the pipe wall, and the cloth bag is inlaid in the groove;

the grouting assembly corresponds to the cloth bag and the bottom end of the tubular pile.

Furthermore, a reinforcing steel bar structure is arranged in the pipe wall.

Further, the grouting assembly includes:

the pile side grouting pipe is embedded in the pipe wall and is connected to the steel bar structure;

the cloth bag grouting pipe is embedded in the pipe wall and is connected to the steel bar structure;

the pile side slurry outlet is formed in the side edge of the bottom end of the pipe wall and is communicated with the pile side grouting pipe;

the pile body slurry outlet is arranged at the groove, and is communicated with the cloth bag grouting pipe.

Further, the distance between the pile side grout outlet and the bottom end of the tubular pile is larger than 50cm.

Further, a cloth bag hoop is hinged in the groove and used for fixing the cloth bag.

Further, the surface of the cloth bag embedded in the groove is flush with the outer surface of the pipe wall.

Further, the outer surface of the cloth bag is provided with an uneven thread structure.

One embodiment of the present utility model also provides a piling rig comprising:

the heel tube cloth bag pile while drilling for a beaded karst cave according to any one of the above embodiments; and

the heel tube cloth bag pile drilling machine while drilling for the bead karst cave is used for drilling the land;

the power head clamp is arranged on a drilling machine of the heel-while-drilling tubular cloth bag pile for the bead karst cave and used for fixing the top end of the heel-while-drilling tubular cloth bag pile for the bead karst cave;

pile clamp fixture, pile clamp fixture installs subaerial that corresponds at the stake hole for fix the pile body that is used for the following pipe sack stake of pearl karst cave along with boring.

Further, the while-drilling heel tube cloth bag pile drilling machine for the beaded karst cave comprises:

a power head;

the long spiral drill rod is hung on the power head and rotates in the hollow inner cavity;

and the reamer bit is arranged at the bottom end of the long spiral drill rod.

Further, the reamer bit is embedded with diamond.

The following beneficial effects are provided for the heel tube cloth bag pile while drilling or the piling device provided by the embodiment:

1. the utility model provides a heel tube cloth bag pile while drilling for a string ball karst cave, which solves the problems of smaller pile diameter and insufficient bearing capacity of PHC pipe piles in the traditional hammering method or static pressure method, simultaneously avoids engineering accidents such as pile breakage, pile body defect, collapse of karst cave roof and the like which are easy to cause in pipe pile construction, and can enable the pile end of a large-diameter pipe pile to be embedded into a middle breeze rock stratum; along with boring with pipe sack stake need not mud dado, need not karst cave grouting backfill or full sleeve dado, has overcome traditional bored concrete pile and has very easily had the problem that mud revealed and grout revealed, has avoided bored concrete pile easy to take place to collapse hole, drilling skew, leak thick liquid, card engineering accident such as boring, the bearing capacity is high, construction cost is low.

2. The heel tube cloth bag pile while drilling has the advantages of large pile diameter and high pile body strength, the cloth bag of the heel tube cloth bag pile while drilling is inlaid in the groove of the pile body of the pipe pile, the pile diameter of the cloth bag position is unchanged, so that smooth pile sinking is ensured, meanwhile, a cloth bag grouting pipe is arranged in the middle of the cloth bag, a karst cave cavity can be plugged after the cloth bag is filled with slurry, and the cloth bag is provided with a convex-concave thread structure, so that pile side friction resistance is greatly improved; and after the slurry is filled into the cloth bag, the karst cave is blocked, the diameter of the tubular pile is thickened in the non-form of the grouting body in the karst cave, the bulge similar to a bamboo joint is formed, and the cave of the bead-string karst cave is greatly utilized to improve the pile side friction resistance.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of a heel tube cloth bag pile while drilling;

FIG. 2 is a schematic view of the bag of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the heel tube bag pile while drilling of FIG. 1;

FIG. 4 is a schematic diagram of the overall construction of a heel tube cloth-bag pile while drilling;

FIG. 5 is a schematic diagram of a cave of a karst cave while drilling with an upper layer bead string during construction of a pipe cloth bag pile;

FIG. 6 is a schematic diagram of a bottom-layer string bead type karst cave cavity drilled through while drilling and embedded into a rock stratum in construction of a heel tube bag pile;

FIG. 7 is a schematic diagram of foam concrete pouring into a string-bead karst cave cavity while drilling following pipe cloth-bag pile construction;

FIG. 8 is a schematic diagram of continuous drilling after initial setting of foam concrete in construction of a heel tube bag pile while drilling;

FIG. 9 is a schematic view of fine stone concrete poured into a construction pile end of a heel tube bag pile while drilling;

FIG. 10 is a schematic diagram of the construction of a heel tube bag pile while drilling, wherein the pile end of the heel tube bag pile while drilling is pressed into fine stone concrete which is not solidified;

FIG. 11 is a schematic illustration of "pile-soil gap" grouting of the lower portion of a cloth bag for heel tube cloth bag pile construction while drilling;

FIG. 12 is a schematic diagram of grouting in a cloth bag for heel tube cloth bag pile construction while drilling;

FIG. 13 is a schematic illustration of "pile-soil gap" grouting of the upper portion of a bag for heel tube bag pile while drilling construction;

in the figure: 100. heel tube cloth bag pile while drilling;

110. a tubular pile; 111. a hollow interior cavity; 112. a tube wall; 1121. grouting pipe at the pile side; 1122. a cloth bag grouting pipe; 1123. a pile side grout outlet; 1124. a pile body grout outlet; 1125. a rebar structure; 113. a groove; 1131. a cloth bag hoop;

120. a cloth bag; 121. a thread-like structure;

200. piling equipment;

210. drilling machine for heel tube cloth bag pile while drilling; 211. a long auger stem; 212. reaming bit;

220. a power head clamp;

230. pile gripper clamp;

240. a power head.

300. Foam concrete; 301. fine stone concrete.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if a directional indication (such as up, down, left, right, front, and rear … …) is involved in the embodiment of the present utility model, the directional indication is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional indication is correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B "including a scheme, or B scheme, or a scheme where a and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1-3, a heel tube cloth bag pile while drilling 100 for a beaded karst cave, comprising:

the pipe pile 110 comprises a pipe wall 112, a grouting assembly is embedded in the pipe wall 112, the pipe pile 110 is of a hollow structure, and a hollow inner cavity 111 is formed in the hollow part;

a cloth bag 120, a groove 113 is formed on the outer side of the pipe wall 112, and the cloth bag 120 is inlaid in the groove 113;

wherein, the grouting assembly corresponds to the cloth bag 120 and the bottom end of the pipe pile 110.

According to the technical scheme provided by the utility model, the problems of small pile diameter and insufficient bearing capacity of the PHC pipe pile 110 by a traditional hammering method or a static pressure method are solved, meanwhile, engineering accidents such as pile breakage, pile body defect, collapse of a karst cave roof and the like which are easy to cause in the construction of the pipe pile 110 are avoided, and the pile end of the large-diameter pipe pile 110 can be embedded into a middle breeze rock stratum; the following pipe cloth bag pile 100 while drilling does not need slurry protection wall, does not need karst cave grouting backfill treatment or full sleeve protection wall, overcomes the problems that the traditional filling pile is easy to cause slurry leakage and cement slurry leakage, avoids engineering accidents such as hole collapse, drilling deflection, slurry leakage, drilling sticking and the like, and has high bearing capacity and low construction cost;

the grouting components are arranged in the pipe wall 112, the slurry can be used for filling the cloth bag 120 and then plugging the karst cave, the diameter of the pipe pile 110 is thickened in the non-form of the grouting body in the karst cave, the bulge similar to a bamboo joint is formed, and the cave of the bead-string karst cave is greatly utilized to improve the pile side friction resistance.

It should be noted that, the length of the cloth bag 120 is about 3-5m greater than the height of the corresponding karst cave, and the central points of the groove 113 and the cloth bag 120 are vertically upward and coincide with or deviate from the central point of the corresponding cave by 20-50 cm.

Referring to fig. 1, preferably, a reinforcing structure 1125 is disposed inside the pipe wall 112.

Specifically, by arranging the steel bar structures 1125 in the pipe wall 112, the pipe pile 110 is firmer, the defects of pile breakage and pile body easily caused during construction of the pipe pile 110 are avoided, and meanwhile, the construction of pile sinking of the pipe pile 110 is better matched.

Referring to fig. 1 and 10-13, the grouting assembly preferably comprises:

a pile-side grouting pipe 1121, wherein the pile-side grouting pipe 1121 is pre-embedded in the pipe wall 112, and the pile-side grouting pipe 1121 is connected to the reinforcing steel bar structure 1125;

the cloth bag grouting pipe 1122 is pre-buried in the pipe wall 112, and the cloth bag grouting pipe 1122 is connected to the steel bar structure 1125;

a pile-side slurry outlet 1123, wherein the pile-side slurry outlet 1123 is formed at the side of the bottom end of the pipe wall 112, and the pile-side slurry outlet 1123 is communicated with the pile-side grouting pipe 1121;

pile body grout outlet 1124, pile body grout outlet 1124 is set up at groove 113, and pile body grout outlet 1124 is connected with cloth bag grouting pipe 1122.

Specifically, grouting or grouting the cloth bag 120 and the positions of the cloth bag 120 and the pile body comprises the following steps:

step one: pouring high-pressure clean water into the pile side grouting pipe 1121 to open a grouting outlet and a pile side grouting channel of the pile side grouting pipe 1121, pouring cement slurry into the pile side through the grouting pipe, and stopping grouting at the pile side at the moment when the flowing height is about to reach the last cavity of the bottommost cavity of the through-bead type karst cavity;

step two: grouting is carried out into the cloth bag 120 through the cloth bag grouting pipe 1122, the cloth bag 120 is gradually squeezed by the slurry under the grouting pressure and expands in a certain volume, at the moment, the cloth bag 120 just seals a karst cave cavity corresponding to the pile body, the cloth bag 120 is gradually squeezed by the slurry under the grouting pressure and expands in a certain volume, and the length of the cloth bag 120 is about 3-5m greater than the height of the karst cave cavity corresponding to the pile body, so that the cavity of the karst cave can be sealed after the cloth bag 120 is filled with the slurry, and leakage of slurry at the pile side is prevented;

step three: the slurry is filled in the cloth bag 120 and then is continuously poured into the cloth bag 120 through the cloth bag grouting pipe 1122, the excessive slurry flows to a pile-soil gap from the slurry outlets at the upper end and the lower end of the cloth bag 120, and the slurry flowing out from the slurry outlets at the lower end of the cloth bag 120 continuously extrudes the pile-soil gap filled by the slurry at the lower part of the cloth bag 120, so that the slurry is continuously diffused into soil, and the grouting effect is improved; the slurry flowing out from the slurry outlet at the upper end of the cloth bag 120 fills the pile-soil gap at the upper part of the cloth bag 120 until the slurry is injected at the pile end.

Preferably, the distance between the pile-side grout outlet 1123 and the bottom end of the pipe pile 110 is greater than 50cm.

Specifically, the distance between the pile-side grout outlet 1123 and the lower end of the pipe pile 110 is greater than 50cm, so as to ensure that the fine-stone concrete 301 is embedded in the pile end in the later stage and cannot be blocked by the fine-stone concrete.

Preferably, a bag cuff 1131 is hinged in the groove 113 for fixing the bag 120;

the surface of the cloth bag 120 embedded in the groove 113 is flush with the outer surface of the pipe wall 112.

Specifically, the cloth bag 120 of the heel tube cloth bag pile 100 while drilling is inlaid in the groove 113 of the pile body of the tubular pile 110, and the pile diameter of the position of the cloth bag 120 is unchanged, so that smooth pile sinking is ensured.

Referring to fig. 2, preferably, the outer surface of the cloth bag 120 is provided with an uneven thread-like structure 121.

Specifically, the slurry is filled into the cloth bag 120 to seal the karst cave cavity, and the cloth bag 120 is provided with the rugged screw thread-shaped structure 121, so that the pile side friction resistance is greatly improved.

Referring to fig. 4-6 and 8, one embodiment of the present utility model further provides a piling rig 200 comprising:

a heel tube cloth bag while drilling pile 100 for a beaded karst cave according to any one of the above embodiments; and

the heel tube cloth bag pile drilling machine 210 while drilling for the bead karst cave is used for drilling the land;

the power head clamp 220 is arranged on the heel-while-drilling tubular cloth bag pile drilling machine 210 for the bead karst cave and is used for fixing the top end of the heel-while-drilling tubular cloth bag pile 100 for the bead karst cave;

the pile clamp 230 is installed on the ground corresponding to the pile hole, and is used for fixing the pile body of the heel tube cloth bag pile 100 while drilling for the beaded karst cave;

the heel tube cloth bag pile drilling machine 210 while drilling for the beaded karst cave comprises:

a power head 240;

a long auger stem 211, the long auger stem 211 being suspended on a power head 240, the long auger stem 211 rotating within the hollow interior 111;

a reamer bit 212, said reamer bit 212 being mounted at the bottom end of the long auger stem 211.

The reamer bit 212 has diamond embedded therein.

Specifically, a power head 240 is arranged in the drilling machine 210 of the heel tube cloth bag pile while drilling, a long spiral drill rod 211 is hoisted on the power head 240, the power head 240 can drive the long spiral drill rod 211 to rotate clockwise and anticlockwise, the heel tube cloth bag pile while drilling 100 is sleeved outside the long spiral drill rod 211, a power head clamp 220 can clamp the upper end of the heel tube cloth bag pile while drilling 100 to prevent the heel tube cloth bag pile from falling off, the heel tube cloth bag pile while drilling 100 can be loosened to enable the heel tube cloth bag pile while drilling 100 to sink smoothly when needed, a reaming bit 212 embedded with diamond is fixed at the tail end of the long spiral drill rod 211, and the reaming bit 212 can be tunneled smoothly in a medium breeze rock stratum; pile clamp 230 is fixed on the ground corresponding to the pile hole, pile clamp 230 can clamp or loosen the following-drilling tubular bag pile 100 according to pile sinking requirements, pile sinking pressure applied by the self-weight pressure and pile end of the following-drilling tubular bag pile 100 can be borne, pile clamp 230 clamp base is arranged at the lower part of pile clamp 230, pile clamp 230 clamp base is large, clamping force can be transmitted to the ground through pile clamp base, and perpendicularity of the following-drilling tubular bag pile 100 can be guaranteed.

Referring to fig. 4-13, the use flow of the present utility model includes the following steps:

step S10: determining the position and the height of each cavity of the bead-string karst cave according to the geological exploration result, embedding a cloth bag 120 on the tubular pile 110, wherein the cloth bag 120 corresponds to the position and the height of each cavity of the bead-string karst cave;

step S20: drilling, pile sinking and soil discharging are carried out through the piling equipment 200, when the piling equipment 200 drills into a rock stratum in the bottom plate of the bottommost cavity for a certain distance, the long spiral drill rod 211 is reversely rotated, the reaming wing plate on the reaming bit 212 is retracted, when foam concrete 300 is poured into the bottommost beaded cavity, the heel tube cloth bag 120 is positioned at the top plate of the bottommost cavity while drilling, foam concrete 300 is poured into the bottommost beaded cavity, the filling body formed by the foam concrete 300 has enough width, the width of the filling body formed by the foam concrete 300 is not less than 2 times of the pile diameter, and meanwhile, the foam concrete 300 has quick setting characteristics so as to shorten the construction period;

when the drill bit is about to drill through the top plate of the bottommost cavity of the beaded karst cave, the pile clamping device clamp 230 clamps the pile body of the heel tube cloth bag pile 100 while drilling to limit the sinking of the heel tube cloth bag pile, at the moment, the long spiral drill rod 211 can continue sinking, and the long spiral drill rod 211 drives the drill bit to continue drilling until the drill bit penetrates through the top plate of the bottommost cavity of the beaded karst cave;

when the foam concrete 300 is poured, the sediment at the pile end can be not cleaned, the foam concrete 300 can be directly poured into the bottommost cavity of the bead-string karst cave through the hollow inner cavity 111, the bottommost cavity can be partially filled without being completely filled, and the filling body formed by the foam concrete 300 has enough width; filling foam concrete 300 is filled to a height lower than the elevation of the pile end at the moment and higher than the top plate of the bottommost cavity of the string-bead karst cave, and drilling holes with a certain height are completely filled, so that the pile end is prevented from being glued by the foam concrete 300 to increase the pile sinking resistance in the later stage, and leakage of slurry at the pile side and fine stone concrete 301 at the pile end are prevented;

the pile driving apparatus 200 performs drilling, pile sinking and soil discharging operations comprising the steps of:

step S21: the heel tube cloth bag pile while drilling 100 is clamped and fixed on the ground by the pile clamping device clamp 230, and the long spiral drill rod 211 and the reaming bit 212 are driven to rotate simultaneously by power provided by the power head 240 to drill holes, wherein the diameter of the drilled holes is slightly larger than the outer diameter of the heel tube cloth bag pile while drilling 100;

step S22: while the drilling operation is performed in step S21, the pile gripper clamp 230 gradually loosens the heel tube bag pile while drilling 100, so that the heel tube bag pile while drilling 100 sinks synchronously in the drill hole along with the reaming bit 212;

step S23: the residual soil generated by drilling is carried out to the pile top soil discharging box through the long spiral drill rod 211 in the inner cavity of the heel tube cloth bag pile 100 while drilling.

Step S30: after the foam concrete 300 is initially set, the reaming bit 212 and the long spiral drill rod 211 pass through the bottommost cavity of the bead-string karst cave and then continue drilling until the reaming bit 212 continuously enters the rock layer in the bottommost cavity bottom plate, drilling is stopped after the reaming bit 212 continuously enters more than 0.5m, the long spiral drill rod 211 is reversely rotated, the reaming wing plate of the reaming bit 212 is retracted under the action of residue soil resistance, the long spiral drill rod 211 and the drill bit in a contracted state are lifted out of the inner cavity of the tubular pile 110, a rotary bucket is adopted to extend into the pile end from the inner cavity of the tubular pile 110, and residue soil at the pile end is gradually cleaned completely; fine stone concrete 301 is then poured through the lumen of the tube stake 110;

immediately after the fine stone concrete 301 is poured, pressing the pile end of the heel tube cloth bag pile while drilling 100 into a rock stratum through a power head 240 of the heel tube cloth bag pile while drilling machine 210, and cementing the pile end and the rock stratum into a whole under the action of the fine stone concrete 301;

step S40: grouting or grouting the cloth bag 120 and the positions of the cloth bag 120 and the pile body comprises the following steps:

step S41: pouring high-pressure clean water into the pile side grouting pipe 1121 to open a grouting outlet and a pile side grouting channel of the pile side grouting pipe 1121, pouring cement slurry into the pile side through the grouting pipe, and stopping grouting at the pile side at the moment when the flowing height is about to reach the last cavity of the bottommost cavity of the through-bead type karst cavity;

step S42: grouting is carried out into the cloth bag 120 through the cloth bag grouting pipe 1122, the cloth bag 120 is gradually squeezed by the slurry under the grouting pressure and expands in a certain volume, at the moment, the cloth bag 120 just seals a karst cave cavity corresponding to the pile body, the cloth bag 120 is gradually squeezed by the slurry under the grouting pressure and expands in a certain volume, and the length of the cloth bag 120 is about 3-5m greater than the height of the karst cave cavity corresponding to the pile body, so that the cavity of the karst cave can be sealed after the cloth bag 120 is filled with the slurry, and leakage of slurry at the pile side is prevented;

step S43: the slurry is filled in the cloth bag 120 and then is continuously poured into the cloth bag 120 through the cloth bag grouting pipe 1122, the excessive slurry flows to a pile-soil gap from the slurry outlets at the upper end and the lower end of the cloth bag 120, and the slurry flowing out from the slurry outlets at the lower end of the cloth bag 120 continuously extrudes the pile-soil gap filled by the slurry at the lower part of the cloth bag 120, so that the slurry is continuously diffused into soil, and the grouting effect is improved; the slurry flowing out from the slurry outlet at the upper end of the cloth bag 120 fills the pile-soil gap at the upper part of the cloth bag 120 until the slurry is injected at the pile end.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. A heel pipe sack stake while drilling for string of pearl karst cave, its characterized in that includes:

the pipe pile comprises a pipe wall, a grouting assembly is pre-embedded in the pipe wall, the pipe pile is of a hollow structure, and a hollow inner cavity is formed in the hollow part;

a cloth bag, wherein a groove is formed in the outer side of the pipe wall, and the cloth bag is inlaid in the groove;

the grouting assembly corresponds to the cloth bag and the bottom end of the tubular pile.

2. A heel tube cloth bag pile while drilling for a beaded karst cave according to claim 1, wherein,

and a steel bar structure is arranged in the pipe wall.

3. A heel tube cloth bag pile while drilling for a beaded karst cave according to claim 2, wherein,

the grouting assembly includes:

the pile side grouting pipe is embedded in the pipe wall and is connected to the steel bar structure;

the cloth bag grouting pipe is embedded in the pipe wall and is connected to the steel bar structure;

the pile side slurry outlet is formed in the side edge of the bottom end of the pipe wall and is communicated with the pile side grouting pipe;

the pile body slurry outlet is arranged at the groove, and is communicated with the cloth bag grouting pipe.

4. A heel tube cloth bag pile while drilling for a beaded karst cave according to claim 3, wherein,

the distance between the pile side grout outlet and the bottom end of the pipe pile is greater than 50cm.

5. A heel tube cloth bag pile while drilling for a beaded karst cave according to claim 1, wherein,

and a cloth bag hoop is hinged in the groove and used for fixing the cloth bag.

6. The heel tube cloth bag pile while drilling for the beaded karst cave according to claim 5, wherein the heel tube cloth bag pile while drilling is used for the beaded karst cave,

the surface of the cloth bag embedded in the groove is flush with the outer surface of the pipe wall.

7. The heel tube cloth bag pile while drilling for the beaded karst cave according to claim 6, wherein the heel tube cloth bag pile while drilling is used for the beaded karst cave,

the outer surface of the cloth bag is provided with an uneven thread structure.

8. A piling rig, comprising:

a heel tube bag stake while drilling for a beaded karst cave as claimed in any one of claims 1 to 7; and

the heel tube cloth bag pile drilling machine while drilling for the bead karst cave is used for drilling the land;

the power head clamp is arranged on a drilling machine of the heel-while-drilling tubular cloth bag pile for the bead karst cave and used for fixing the top end of the heel-while-drilling tubular cloth bag pile for the bead karst cave;

pile clamp fixture, pile clamp fixture installs subaerial that corresponds at the stake hole for fix the pile body that is used for the following pipe sack stake of pearl karst cave along with boring.

9. A piling device according to claim 8, wherein,

the while-drilling heel tube cloth bag pile drilling machine for the beaded karst cave comprises:

a power head;

the long spiral drill rod is hung on the power head and rotates in the hollow inner cavity;

and the reamer bit is arranged at the bottom end of the long spiral drill rod.

10. A piling device according to claim 9, wherein,

the reamer bit is embedded with diamond.