CN211446931U - Grouting pipe structure of post-grouting bored pile in desert area - Google Patents
Grouting pipe structure of post-grouting bored pile in desert area Download PDFInfo
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- CN211446931U CN211446931U CN201921891073.9U CN201921891073U CN211446931U CN 211446931 U CN211446931 U CN 211446931U CN 201921891073 U CN201921891073 U CN 201921891073U CN 211446931 U CN211446931 U CN 211446931U
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Abstract
The utility model discloses a grouting pipe structure of a post-grouting bored pile in a desert area, which comprises a reinforcement cage and axial grouting pipes which are connected to the inner side of the reinforcement cage at intervals; the axial grouting pipe comprises an axial grouting pipe and an axial grouting pipe, wherein the axial grouting pipe is connected with the reinforcement cage in the longitudinal direction in a through-length mode, and the axial grouting pipe is smaller than the longitudinal length of the reinforcement cage; the bottom end of the axial grouting pipe arranged in the full length is connected with an end grouting head; the bottom end of the axial grouting pipe which is smaller than the length of the reinforcement cage in the length direction is detachably connected with an annular grouting pipe through a T-shaped joint. The utility model can realize two modes of bottom grouting and annular grouting of the reinforcement cage through grouping the axial grouting pipes, and the annular grouting can be arranged at intervals according to the geology, thus being beneficial to avoiding compact rock stratums which are difficult to be grouted; the axial grouting pipes can be connected in a direction-changing manner to form annular grouting through the arrangement of the T-shaped joints; through the sticky tape setting, avoid out the jam of thick liquid hole, its impact force is less than the impact force of later stage injected water when selecting the sticky tape, and the later stage slip casting of being convenient for is opened the stopper.
Description
Technical Field
The utility model belongs to the technical field of slip casting construction behind the bored concrete pile, in particular to slip casting tubular construction of slip casting bored concrete pile behind desert area.
Background
The post-grouting of the cast-in-situ bored pile refers to a construction technology of injecting cement slurry through an embedded grouting pipe by using a high-pressure grouting pump after the cast-in-situ bored pile is formed and the pile body concrete reaches a preset strength. But in desert areas, the geological environment is complex, and the post-grouting technology of the cast-in-situ bored pile is less under the geological condition of local soil compactness. And because of the existence of compact rock layers such as mudstone, sandstone and the like, the smooth operation of post-grouting is not facilitated. In addition, the slurry outlet hole is easy to block in desert geology and concrete pouring, and the difficulty is caused by the post-grouting.
SUMMERY OF THE UTILITY MODEL
The utility model provides a grouting pipe structure of desert area back slip casting bored concrete pile for solve the desert area back slip casting construction when the bored concrete pile, pour, the hoop is connected when pouring to the layering of the fine and close rock stratum of texture and is installed and prevent the jam scheduling technical problem in grout outlet.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a grouting pipe structure of a post-grouting bored pile in a desert area comprises a reinforcement cage and axial grouting pipes which are connected to the inner side of the reinforcement cage at intervals;
the axial grouting pipe comprises an axial grouting pipe and an axial grouting pipe, wherein the axial grouting pipe is connected with the reinforcement cage in the longitudinal direction in a through manner, and the axial grouting pipe is smaller than the longitudinal length of the reinforcement cage; the bottom end of the axial grouting pipe arranged in the full length is connected with an end grouting head;
the bottom end of the axial grouting pipe, which is smaller than the length of the reinforcement cage in the longitudinal direction, is detachably connected with an annular grouting pipe through a T-shaped joint; the annular grouting pipe is connected to the annular outer side of the reinforcement cage; the vertical distance between two adjacent annular grouting pipes is suitable for the thickness of a mud rock layer, an sandstone layer or a part of slightly weathered rock layer in a desert area.
Furthermore, a bent connecting pipe can be detachably connected between the T-shaped joint and the axial grouting pipe, one end of the bent connecting pipe is connected with the bottom of the axial grouting pipe, and the other end of the bent connecting pipe is connected with the vertical part of the T-shaped joint.
Furthermore, the vertical part of the T-shaped joint penetrates out of the reinforcement cage, and the transverse part is vertical to the longitudinal reinforcement of the reinforcement cage; and two ends of the transverse part of the T-shaped joint are respectively connected with an annular grouting pipe.
Furthermore, the vertical part of the T-shaped joint is detachably connected with the bent connecting pipe through the straight connecting pipe, and the length of the straight connecting pipe is adapted to the length of the vertical part of the T-shaped joint penetrating out of the reinforcement cage.
Furthermore, slurry outlet holes are arranged on the annular grouting pipe at intervals, and the outer sides of the slurry outlet holes are connected with adhesive tapes; and the adhesive tapes on two sides of the T-shaped joint are connected with water-stopping clips.
Furthermore, the reinforcement cage comprises reinforcement cage longitudinal reinforcements arranged in the circumferential direction and reinforcement cage stirrups connected to the longitudinal direction of the reinforcement cage longitudinal reinforcements at intervals;
and a positioning rib is connected between the longitudinal rib of the reinforcement cage and the axial grouting pipe.
Furthermore, the positioning ribs are annular ribs and are connected with the reinforcement cage and the axial grouting pipe through tie bars respectively.
Furthermore, tip slip casting head contains straight slip casting pipe and connects in the toper slip casting head of straight slip casting bottom of tubes portion, and the axial slip casting pipe is connected at straight slip casting top of tubes portion and straight slip casting pipe outer wall goes up the interval and is provided with out the thick liquid hole, and it has the sticky tape to paste outside the play thick liquid hole.
Furthermore, the adhesive tape is a cloth-based adhesive tape, and the impact strength of the adhesive tape is smaller than the impact force of water injected into the axial grouting pipe at the grout outlet.
Furthermore, the end grouting head and the axial grouting pipe connected with the end grouting head are connected with the reinforcement cage through binding bars.
The beneficial effects of the utility model are embodied in:
1) the utility model can realize two modes of bottom grouting and annular grouting of the reinforcement cage through grouping the axial grouting pipes, and the annular grouting can be arranged at intervals according to the geology of a desert area, thus being beneficial to avoiding compact terranes which are difficult to be grouted;
2) the utility model can change the direction of the axial grouting pipe into the circumferential grouting through the arrangement of the T-shaped joint, and the arrangement of the bent connecting pipe and the straight connecting pipe is beneficial to the switching and the T-shaped joint to penetrate out of the reinforcement cage; the T-shaped joint is detachably connected with other components, so that the T-shaped joint is convenient to install and replace;
3) the utility model is connected with the outer side of the grout outlet through the adhesive tape, thereby avoiding other loose particles from entering the grout outlet when concreting and in the pouring hole; the impact resistance of the adhesive tape is smaller than that of later-stage injected water when the adhesive tape is selected, so that the plug is conveniently opened during later-stage grouting;
the utility model discloses still be provided with the location muscle between axial slip casting pipe and steel reinforcement cage, do benefit to the installation and the location of guaranteeing axial slip casting pipe, and setting up respectively of hoop slip casting pipe and tip slip casting head does benefit to the construction of back slip casting with the installation, saves engineering time, guarantees construction quality. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention; the primary objects and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description.
Drawings
FIG. 1 is a schematic view of a connection structure of a reinforcement cage and a circumferential grouting pipe;
FIG. 2 is a schematic view of an end grouting head connection;
FIG. 3 is a schematic view of a T-junction connection structure.
Reference numerals: 1-axial grouting pipe, 2-bending connecting pipe, 3-straight connecting pipe, 4-T type joint, 5-circumferential grouting pipe, 6-grout outlet, 7-reinforcement cage longitudinal bar, 8-reinforcement cage stirrup, 9-positioning bar, 10-water stop clip, 11-end grouting head and 12-adhesive tape.
Detailed Description
Taking the post-grouting bored pile construction in a certain desert area as an example, after the drilling is finished, the hole diameter detection, the hole depth detection and the hole position verticality detection are carried out, wherein the hole diameter detection mainly adopts an infrared detector, and the deviation cannot exceed +/-2 cm. Detecting the hole depth by using an infrared distance meter, wherein the deviation is not more than +/-10 cm; and (5) detecting the verticality, wherein when the pile hole is deep, the detection can be performed once every 10 m.
As shown in fig. 1, after the reinforcement cage is processed, axial grouting pipes 1 are bound, and a pile side ring is bound to a grouting pipe 5; and hoisting the reinforcement cage after passing the acceptance check. The grouting pipe structure of the grouting bored pile comprises a reinforcement cage and axial grouting pipes 1 bound on the inner side of the reinforcement cage at intervals.
In the embodiment, the reinforcement cage comprises reinforcement cage longitudinal reinforcements 7 arranged annularly and reinforcement cage stirrups 8 connected to the longitudinal direction of the reinforcement cage longitudinal reinforcements 7 at intervals; and a positioning rib 9 is connected between the longitudinal rib 7 of the reinforcement cage and the axial grouting pipe 1. The positioning ribs 9 are annular ribs, and the positioning ribs 9 are respectively connected with the reinforcement cage and the axial grouting pipe 1 through binding ribs.
In the embodiment, the axial grouting pipe 1 is made of a seamless steel pipe with the diameter of 32mm, and the axial grouting pipe 1 comprises the axial grouting pipe 1 which is connected with the reinforcement cage in the longitudinal direction in a through manner and the axial grouting pipe 1 which is smaller than the longitudinal length of the reinforcement cage; the bottom end of the axial grouting pipe 1 arranged in the full length is connected with an end grouting head 11.
As shown in fig. 2, the end grouting head 11 is made of a stainless steel pipe, and both the end grouting head 11 and the axial grouting pipe 1 connecting the end grouting head 11 are connected to the reinforcement cage through a binding bar; tip slip casting head 11 contains straight slip casting pipe and connects in the toper slip casting head of straight slip casting bottom of tubes portion, and the axial slip casting pipe 1 is connected at straight slip casting top of tubes portion and the interval is provided with out grout hole 6 on the straight slip casting outer wall, and it has sticky tape 12 to paste in the hole 6 outside of going out.
In the embodiment, the bottom end of the axial grouting pipe 1, which is smaller than the length of the reinforcement cage in the longitudinal direction, is detachably connected with an annular grouting pipe 5 through a T-shaped joint 4; the annular grouting pipe 5 is connected to the outer side of the steel bar cage; the vertical distance between two adjacent annular grouting pipes 5 is suitable for the thickness of a mud rock layer, an sandstone layer or a part of slightly weathered rock layer in a desert area.
In the embodiment, the installation position of the side circumferential grouting pipe 5 is adjusted according to the soil property record during drilling, the side circumferential grouting pipe 5 is installed twice, and the geology is a sand layer or a completely weathered rock layer within the range of 5-15m according to the field geological survey condition. Therefore, the first annular grouting pipe 5 is arranged at 1/3 positions of the top of the pile within the range of a sand layer and a completely weathered rock stratum, and the second annular grouting pipe 5 is arranged at 2/3 positions of the pile body; the distance between the two grouting pipes exceeds the length 1/4 of the pile body, and the local pile avoids geological rock formations such as mudstone, sandstone or partially slightly weathered rock formations according to the installation position of the annular grouting pipe 5.
As shown in fig. 3, the T-shaped joint 4 is made of a stainless steel pipe, a bent connecting pipe 2 is connected between the T-shaped joint 4 and the axial grouting pipe 1 through threads, one end of the bent connecting pipe 2 is connected with the bottom of the axial grouting pipe 1 through threads, and the other end of the bent connecting pipe is connected with the vertical part of the T-shaped joint 4 through threads; the vertical part of the T-shaped joint 4 penetrates out of the reinforcement cage, and the transverse part is vertical to the longitudinal reinforcement 7 of the reinforcement cage; two ends of the transverse part of the T-shaped joint 4 are respectively connected with an annular grouting pipe 5; the vertical part of the T-shaped joint 4 is connected with the bent connecting pipe 2 through the straight connecting pipe 3 in a threaded manner, and the length of the straight connecting pipe 3 is adapted to the length of the vertical part of the T-shaped joint 4 penetrating out of the reinforcement cage. The annular grouting pipe 5 is provided with grout outlet holes 6 at intervals, and the outer sides of the grout outlet holes 6 are connected with adhesive tapes 12; the adhesive tape 12 on both sides of the T-shaped joint 4 is connected with a water stop clip 10.
In this embodiment, the adhesive tape 12 is a cloth-based adhesive tape, and the impact strength of the adhesive tape 12 is smaller than the impact force of water injected into the axial grouting pipe 1 at the grout outlet 6. 8-12 h after concrete pouring is finished, utilizing a grouting pump to axially grout the pipe1 in 6m3Water, breaking the concrete protective layer and the cloth-based adhesive tape. If the plugging is not successful under the designed pressure, the injection pressure is gradually increased until the concrete protective layer and the cloth base adhesive tape are damaged, and then the pressure is reduced to a certain value, wherein the maximum water pressure does not exceed the maximum capacity of the grouting pump.
During construction, grouting is started 2 days after pouring concrete, and grouting construction is performed at the bottom end of the pile; and (5) after grouting at the bottom of the pile is finished, grouting at the side of the pile. And grouting from the upper grouting pipe to the pile side, and gradually moving to the lower grouting pipe. The grouting process should be terminated after any of the following conditions is met: a) the grouting pressure reaches a design value, and the grouting amount reaches the design value; b) the total grouting amount of the pile bottom and the pile side reaches 75 percent of the target amount, the grouting pressure reaches 1.5 times of the upper limit of the required grouting pressure, and the grouting pressure is maintained for 3 min; c) the displacement of the top of the pile exceeds 5mm in the grouting process.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be considered by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. A grouting pipe structure of a post-grouting bored pile in a desert area is characterized by comprising a reinforcement cage and axial grouting pipes (1) which are connected to the inner side of the reinforcement cage at intervals;
the axial grouting pipe (1) comprises an axial grouting pipe (1) which is connected with the reinforcement cage in the longitudinal direction in a through manner and an axial grouting pipe (1) which is smaller than the longitudinal length of the reinforcement cage; the bottom end of an axial grouting pipe (1) which is arranged in the full length is connected with an end grouting head (11);
the bottom end of the axial grouting pipe (1) which is smaller than the length of the reinforcement cage in the longitudinal direction is detachably connected with an annular grouting pipe (5) through a T-shaped joint (4); the annular grouting pipe (5) is connected to the outer side of the reinforcement cage; the vertical distance between two adjacent annular grouting pipes (5) is suitable for the thickness of a mud rock layer, an sandstone layer or a part of slightly weathered rock layer in a desert area.
2. The grouting pipe structure of the post-grouting bored pile in the desert area as claimed in claim 1, wherein a bent connecting pipe (2) is detachably connected between the T-shaped joint (4) and the axial grouting pipe (1), one end of the bent connecting pipe (2) is connected to the bottom of the axial grouting pipe (1), and the other end is connected to the vertical part of the T-shaped joint (4).
3. The grouting pipe structure of the post-grouting bored pile in the desert area as claimed in claim 2, wherein the vertical part of the T-shaped joint (4) penetrates out of the reinforcement cage, and the transverse part is perpendicular to the longitudinal reinforcement (7) of the reinforcement cage; two ends of the transverse part of the T-shaped joint (4) are respectively connected with a circumferential grouting pipe (5).
4. The grouting pipe structure of the post-grouting bored pile in the desert area as claimed in claim 3, wherein the vertical part of the T-shaped joint (4) is detachably connected with the bent connecting pipe (2) through the straight connecting pipe (3), and the length of the straight connecting pipe (3) is adapted to the length of the vertical part of the T-shaped joint (4) penetrating out of the reinforcement cage.
5. The grouting pipe structure of the post-grouting bored pile in the desert area as claimed in claim 3, wherein the circumferential grouting pipe (5) is provided with grout outlet holes (6) at intervals, and the outer side of the grout outlet holes (6) is connected with an adhesive tape (12); the adhesive tapes (12) at the two sides of the T-shaped joint (4) are connected with water-stopping clips (10).
6. The grouting pipe structure of the post-grouting bored pile in the desert area as claimed in claim 1, wherein the reinforcement cage comprises reinforcement cage longitudinal bars (7) arranged in a circumferential direction and reinforcement cage stirrups (8) connected to the reinforcement cage longitudinal bars (7) at intervals in the longitudinal direction; and a positioning rib (9) is connected between the longitudinal rib (7) of the reinforcement cage and the axial grouting pipe (1).
7. The grouting pipe structure of the post-grouting bored pile in the desert area as claimed in claim 6, wherein the positioning ribs (9) are circumferential ribs, and the positioning ribs (9) are connected with the reinforcement cage and the axial grouting pipe (1) through tie bars respectively.
8. The grouting pipe structure of the post-grouting bored pile in the desert area as claimed in claim 1, wherein the end grouting head (11) comprises a straight grouting pipe and a conical grouting head connected to the bottom of the straight grouting pipe, the top of the straight grouting pipe is connected with the axial grouting pipe (1) and the outer wall of the straight grouting pipe is provided with the grout outlet holes (6) at intervals; an adhesive tape (12) is stuck on the outer side of the pulp outlet hole (6).
9. The grouting pipe structure of the post-grouting bored pile in the desert area as claimed in claim 8, wherein the end grouting head (11) and the axial grouting pipe (1) connecting the end grouting heads (11) are connected to the reinforcement cage by a tie bar.
10. The grouting pipe structure of the post-grouting bored pile in the desert area as claimed in claim 5 or 8, wherein said adhesive tape (12) is a cloth-based adhesive tape, and the impact strength of the adhesive tape (12) is smaller than the impact force of the water injected into the axial grouting pipe (1) at the grout outlet (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921891073.9U CN211446931U (en) | 2019-11-05 | 2019-11-05 | Grouting pipe structure of post-grouting bored pile in desert area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921891073.9U CN211446931U (en) | 2019-11-05 | 2019-11-05 | Grouting pipe structure of post-grouting bored pile in desert area |
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| CN211446931U true CN211446931U (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921891073.9U Active CN211446931U (en) | 2019-11-05 | 2019-11-05 | Grouting pipe structure of post-grouting bored pile in desert area |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065453A (en) * | 2020-09-16 | 2020-12-11 | 北京市市政工程研究院 | Rotatable directional grouting pipe for cavity at back of shield segment |
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2019
- 2019-11-05 CN CN201921891073.9U patent/CN211446931U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065453A (en) * | 2020-09-16 | 2020-12-11 | 北京市市政工程研究院 | Rotatable directional grouting pipe for cavity at back of shield segment |
| CN112065453B (en) * | 2020-09-16 | 2022-08-16 | 北京市市政工程研究院 | Rotatable directional grouting pipe for cavity at back of shield segment |
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