Method and system for eliminating inrush of tubular pile in foundation pit
By setting up water conduit pipes and concrete barrier bodies in the core of the foundation pit pipe piles, the problem of pipe piles surges is solved, and the water inrushes is effectively relieved and the adverse effects on foundation pit construction is avoided.
Patent Information
- Application Number
- CN202510511001.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2025-06-20
AI Technical Summary
In foundation pit projects, engineering pipe piles pressed into the soil are prone to surges of pile cores, resulting in adverse effects such as softening of the foundation pit soil and ground settlement.
A water conduit is installed in the die of the pipe pile, and a concrete barrier body is built at the opening of the upper end of the pipe pile, and the water conduit is penetrated by the barrier body. When a burst occurs in the tube core, the water body is discharged through the water conduit to prevent the water from spreading in the foundation pit.
Effectively prevent pipe pile surges, prevent the water surges from causing adverse effects on foundation pit construction, and ensure the safety of the enclosure structure and surrounding environment.
Smart Images
Figure CN120174830A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to an auxiliary device for pile foundation construction, and particularly to a method and system for relieving the gushing of pipe piles in a foundation pit. Background Art
[0002] With the vigorous development of infrastructure at home and abroad, the urban land use area is getting smaller and smaller, and the efficient development and utilization of underground space has become an inevitable trend. When developing underground space, it will involve underground permanent structures and underground temporary structures, which are specifically reflected in two important fields: foundation engineering and foundation pit engineering. Among them, various problems will occur during the construction of engineering piles in foundation engineering. With the development of the project, more or less corresponding solutions have been accumulated in this field. However, due to the different construction conditions and environments of each project, some other unexpected engineering problems will still occur during the project implementation. For example, when the bearing stratum of the engineering pile foundation is in a sandy stratum and the shallow clay stratum is relatively thin, during the pile pressing process of the engineering pipe pile, if the pile pressing speed of the engineering pipe pile is too fast, it will cause too little cohesive soil to be squeezed into the pipe core (although sandy soil can also enter the pipe core, but its permeability is large, and the confined water can still enter the foundation pit through the pipe core), and the soil plug effect is not very obvious, which is likely to cause the pile core to gush during the subsequent foundation pit excavation process, and then lead to problems such as the inability to construct the foundation slab near the pipe pile normally and the softening of the foundation pit bottom soil, which brings safety problems to the retaining structure and the surrounding environment.
[0003] In summary, the problems to be solved by the present invention are as follows:
[0004] In the foundation pit engineering, the engineering pipe piles pressed into the soil are prone to the situation of pile core gushing, which will have an adverse impact on the subsequent construction process of the foundation pit engineering, such as softening of the foundation pit soil, ground settlement, and so on. Summary of the Invention
[0005] The purpose of the present invention is to provide a method and system for relieving the gushing of pipe piles in a foundation pit, which can effectively prevent the pipe piles from gushing and discharge the gushing water body.
[0006] In order to achieve the above technical purpose, the present invention adopts the following technical solutions:
[0007] A method for relieving the gushing of pipe piles in a foundation pit, the gushing relief method includes: arranging a water guide pipe for the pipe core of the pipe pile, one end opening of the water guide pipe is inserted into the pipe core as the water inlet opening, and the other end opening of the water guide pipe is exposed outside the pipe core as the water outlet opening; constructing a concrete blocking body at the upper opening of the pipe core, the concrete blocking body blocks the upper opening of the pipe core, and the water guide pipe penetrates through the concrete blocking body; when gushing occurs in the pipe core, the gushing water body in the pipe core is discharged through the water guide pipe.
[0008] Further, the specific construction method of the concrete blocking body includes: a sealing bottom plate is arranged at a position of the water guide pipe close to the water inlet pipe opening. When the water inlet pipe opening of the water guide pipe is inserted into the pipe core, the sealing bottom plate forms a partition inside the pipe core, so as to separate a section at the upper opening of the pipe core as the upper blocking section; a pumping device is used to pump the water in the pipe core through the water guide pipe, so that the water level in the pipe core drops below the sealing bottom plate; the pre-constructed anchor bars are placed into the upper blocking section of the pipe core, and then concrete is poured in the upper blocking section, so as to construct the concrete blocking body in the upper blocking section.
[0009] Further, the sudden gushing solution method further includes: a temporary sump is excavated and constructed at the bottom of the foundation pit, and a drainage device is arranged for the temporary sump; when a sudden gushing occurs in the pipe pile, the water gushing out to the bottom of the foundation pit converges in the temporary sump, and then the drainage device is used to drain the water in the temporary sump out of the foundation pit.
[0010] Further, the drainage device is a drainage pipe provided with a submersible pump. One end of the drainage pipe is installed with a submersible pump, and the submersible pump is arranged in the temporary sump. The other end of the drainage pipe extends to a pre-constructed drainage ditch outside the foundation pit on the outside of the foundation pit.
[0011] Further, the sudden gushing solution method further includes: a drainage ditch outside the foundation pit is constructed on the outside of the foundation pit. When a sudden gushing occurs in the pipe core, the sudden gushing water in the pipe core is drained out of the foundation pit and discharged into the drainage ditch outside the foundation pit.
[0012] A sudden gushing solution system for pipe piles in a foundation pit, the sudden gushing solution system includes a concrete blocking body and a water guide pipe. The concrete blocking body blocks the upper opening of the pipe core of the pipe pile, and the water guide pipe penetrates through the concrete blocking body; when a sudden gushing occurs in the pipe core, the sudden gushing water in the pipe core can be discharged through the water guide pipe.
[0013] Further, a sealing bottom plate is arranged at a position of the water guide pipe close to the water inlet pipe opening. The sealing bottom plate is used for: when the water inlet pipe opening of the water guide pipe is inserted into the pipe core, the sealing bottom plate forms a partition inside the pipe core, so as to separate a section at the upper opening of the pipe core as the upper blocking section; a pumping device is used to pump the water in the pipe core through the water guide pipe, so that the water level in the pipe core drops below the sealing bottom plate; the pre-constructed anchor bars are placed into the upper blocking section of the pipe core, and then concrete is poured in the upper blocking section, so as to construct the concrete blocking body in the upper blocking section.
[0014] Further, the heave relief system further includes a temporary sump, which is constructed at the bottom of the foundation pit; a drainage device is also configured for the temporary sump; the bottom of the foundation pit and the drainage device are used for: when a heave occurs in the pipe pile, the water surging out to the bottom of the foundation pit converges in the temporary sump, and then the drainage device is used to drain the water in the temporary sump out of the foundation pit.
[0015] Further, the drainage device is a drainage pipe provided with a submersible pump. One end of the drainage pipe is installed with a submersible pump, and the submersible pump is arranged in the temporary sump. The other end of the drainage pipe extends to a drainage ditch outside the foundation pit pre-constructed outside the foundation pit.
[0016] Further, the heave relief system further includes a drainage ditch outside the foundation pit, which is constructed outside the foundation pit; the drainage ditch outside the foundation pit is used for: when a heave occurs inside the pipe core, draining the heave water inside the pipe core out of the foundation pit and discharging it into the drainage ditch outside the foundation pit.
[0017] The beneficial effects of the heave relief method of the present invention compared with the prior art are as follows:
[0018] When a heave occurs inside the pipe core, the heave water inside the pipe core can be discharged through the water guide pipe (a drainage pipeline can also be externally connected), so that the heave water can be prevented from spreading wantonly in the foundation pit, and further, the subsequent construction process of the foundation pit project can be avoided from being adversely affected. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a schematic structural diagram of the method and system for relieving heave of pipe piles in the foundation pit of the present invention;
[0020] Figure 2 is a schematic diagram of the pipe core of the pipe pile in the heave relief method and system of the present invention. DETAILED DESCRIPTION OF THE INVENTION
[0021] First, in order to facilitate a clear and accurate description of the technical solution in the following text, the following definitions are made in advance:
[0022] Definition 1: The "designed core filling bottom" mentioned in this article refers to the core filling depth clearly defined in the original pile foundation design.
[0023] The following further describes the specific embodiments of the present invention:
[0024] In this embodiment, a foundation pit project is involved. In this foundation pit project, the construction of "driving pipe pile 15" is completed at the bottom of the foundation pit, that is, there is a completed pipe pile 15 at the bottom of the foundation pit. In order to relieve the possible heave in the pipe core 5 of the pipe pile 15, this embodiment provides a method for relieving heave of pipe piles in the foundation pit. This heave relief method and system can effectively prevent the pipe pile 15 from heaving.
[0025] It should be noted that, for the convenience of drainage, an external drainage ditch 4 of the foundation pit is usually constructed beside the foundation pit project.
[0026] See Figure 1 and Figure 2 , specifically, the method for discharging and relieving the bursting includes steps S1 to S5.
[0027] S1, Construction preparation work.
[0028] S11, Carry out surface cleaning treatment on the working environment near the pipe piles 15 at the bottom of the foundation pit, and use an excavator to clean up the loose soil near the pipe piles 15.
[0029] S12, Excavate and construct a temporary sump 1 at a position near the pipe piles 15 at the bottom of the foundation pit 2.
[0030] The purpose of constructing the temporary sump 1 is that when the pipe piles 15 burst, it ensures that the water body gushing out to the bottom of the foundation pit 2 can converge in the temporary sump 1, rather than spreading everywhere, controlling the affected area of the water body of the burst on the soil body at the bottom of the foundation pit 2, and ensuring the safety of the retaining structure 12.
[0031] S13, Set a drainage device for the temporary sump 1, and this drainage device is used to drain the water body in the temporary sump 1 into the external drainage ditch 4 of the foundation pit pre-constructed outside the foundation pit, so as to avoid the overflow of the temporary sump 1 caused by excessive gushing water.
[0032] More specifically, the drainage device is essentially a drainage pipe 13 provided with a submersible pump 3. One end of the drainage pipe 13 is installed with the submersible pump 3, and the submersible pump 3 is arranged in the temporary sump 1, and the other end of the drainage pipe 13 extends to the external drainage ditch 4 of the foundation pit.
[0033] S14, Clean the pipe core 5 of the pipe pile 15, and clean the soil in the pipe core 5 to prepare for the subsequent construction of the concrete blocking body 9.
[0034] S2, Set a water guide pipe 6 for the pipe core 5 of the pipe pile 15. The water guide pipe 6 is essentially a steel pipe. One end of the water guide pipe 6 is used as the water inlet pipe and inserted into the pipe core 5, and the other end of the water guide pipe 6 is used as the water outlet pipe and exposed outside the pipe core 5.
[0035] A pumping device (vacuum pump water pipe) is also set for the water outlet pipe of the water guide pipe 6. This pumping device is used to directly pump the water body in the pipe core 5 to the external drainage ditch 4 of the foundation pit through the water guide pipe 6.
[0036] It should be noted that the depth at which the water inlet of the water conduit 6 is inserted into the core 5 should exceed the designed core filling bottom 10 of the pipe pile 15, preferably exceeding the designed core filling bottom 10 by more than two meters (that is, the position of the water inlet of the water conduit 6 is more than two meters below the designed core filling bottom 10). The purpose of such a setting is that when a water pump is used to pump out the water in the core 5, it can ensure that the water level in the core 5 can be effectively reduced below the core filling bottom.
[0037] It should be noted that a disk-shaped sealing bottom plate 8 is arranged at the position of the water conduit 6 close to the water inlet by welding. The specification and size of the sealing bottom plate 8 are matched with the inner diameter of the core 5 of the pipe pile 15, and the sealing bottom plate 8 is perpendicular to the water conduit 6.
[0038] When the water inlet of the water conduit 6 is inserted into the core 5, the sealing bottom plate 8 forms a partition inside the core 5, and the sealing bottom plate 8 can divide the internal space of the core 5 into two sections. For the convenience of description, a section of the core 5 below the sealing bottom plate 8 is defined as the lower main core section (as indicated by the arrow A2 in the figure), and a section of the core 5 above the sealing bottom plate 8 is defined as the upper plugging section (as indicated by the arrow A1 in the figure).
[0039] The upper plugging section will be used to construct the concrete blocking body 9. That is to say, the purpose of setting the sealing bottom plate 8 is to separate an upper plugging section at the upper opening of the core 5, so as to create conditions for the subsequent construction of the concrete blocking body 9.
[0040] It should be noted that when the water conduit 6 is inserted into the core 5, the sealing bottom plate 8 should be below the designed core filling bottom 10. The purpose of such a setting is that the subsequently constructed concrete blocking body 9 can reach below the designed core filling bottom 10. In this way, when a gushing occurs in the core 5, the water level of the gushing water will not be higher than the designed core filling bottom 10.
[0041] Preferably, the position of the sealing bottom plate 8 should be not less than 0.5 meters below the designed core filling bottom 10.
[0042] S3. A pumping device is used to pump the water in the lower main core section of the core 5 through the water conduit 6, so that the water level in the core 5 drops below the sealing bottom plate 8.
[0043] S4. Place the pre-constructed anchored steel bars 11 into the upper plugging section of the core tube 5, and then pour concrete (rapid-hardening expansive concrete) into the upper plugging section, thereby constructing a reinforced concrete solid structure within the upper plugging section of the core tube 5. This reinforced concrete solid structure serves to plug the upper opening of the core tube 5. Therefore, this reinforced concrete solid structure is defined as the concrete plugging body 9. The concrete plugging body 9 plugs the upper end opening of the core tube 5 like a plug, leaving only a water conduit 6 passing through. The gushing water generated within the core tube 5 can only leave the core tube 5 via the water conduit 6.
[0044] It should be noted that the anchored steel bars 11 refer to the main bars in the steel cage of the original design structure, which extend a certain length above the upper opening of the pipe pile 15 to ensure its effective connection between the pipe pile 15 and the floor slab.
[0045] S5. After the constructed concrete plugging body 9 reaches the standard strength (reaching 80% of the design strength), remove the pumping device and retain the water conduit 6, and completely plug the water conduit 6 during the subsequent construction of the floor slab.
[0046] This embodiment also provides a gushing water drainage system, which includes the previously mentioned concrete plugging body 9, water conduit 6, temporary sump 1, external foundation pit drainage ditch 4, drainage device, pumping device, etc. This gushing water drainage system is constructed based on the previously mentioned gushing water drainage method, and for details, refer to the previous gushing water drainage method.
[0047] The gushing water drainage method and system of this embodiment have the following advantages:
[0048] 1) A water conduit 6 is provided for the core tube 5 of the pipe pile 15, and a concrete plugging body 9 is constructed at the upper end opening of the core tube 5 to plug the upper opening of the core tube 5. In this way, when a gushing water occurs within the core tube 5, the gushing water within the core tube 5 can be discharged via the water conduit 6 (and an external drainage pipeline can also be connected), thereby preventing the gushing water from spreading wantonly within the foundation pit and avoiding adverse effects on the subsequent construction process of the foundation pit project.
[0049] 2) The gushing water drainage method and system of this embodiment are economical, convenient, green and environmentally friendly to implement, the construction process is simpler, and the comprehensive effect is remarkable.
[0050] The following introduces the initial concept of the gushing water drainage method and system of the present invention, which is as follows:
[0051] 1) First, use an excavator to clear the surface soil near the pipe pile 15. Meanwhile, dig out a temporary sump 1 near the pipe pile 15 to ensure that the confined water gushing out flows towards this temporary sump 1 at the bottom 2 of the foundation pit, avoiding the random flow of the confined water and thus controlling the affected area of the confined water on the soil at the bottom 2 of the foundation pit, while ensuring the safety of the retaining structure 12.
[0052] 2) The size of the temporary sump 1 should be appropriate, not too large or too deep, to prevent the collapse of the temporary sump 1 or the softening of the soil mass at the bottom 2 of the surrounding foundation pit; install a submersible pump 3 with appropriate power in the temporary sump 1 to effectively drain the confined water in the temporary sump 1 into the drainage ditch 4 outside the foundation pit.
[0053] 3) Clean the soil in the core 5 of the pipe pile 15, insert a water guide pipe 6 into the core 5 of the pipe pile 15, and the insertion depth should be at least not less than 2 m below the designed core filling bottom 10 of the pipe pile 15 to ensure that the water level of the confined water head 7 in the core 5 can be effectively reduced below the core filling bottom.
[0054] The water guide pipe 6 entering the core 5 is made of steel pipe, and a sealing bottom plate 8 is welded on the steel pipe. The size of the sealing bottom plate 8 is the same as that of the core 5 to ensure that the sealing bottom plate 8 can effectively seal the core 5, and thus ensure that the subsequent quickly hardening expansive concrete poured remains within a certain range of the designed core filling bottom 10.
[0055] The depth of the sealing bottom plate 8 should be not less than 0.5 m lower than the designed core filling bottom 10 of the pipe pile 15 to ensure that the actual core filling depth is not less than the designed core filling depth. The water guide pipe 6 should be connected to the drainage ditch 4 outside the foundation pit.
[0056] 4) After the water level of the confined water head 7 in the core 5 is reduced below the sealing bottom plate 8, insert the anchor-reinforcing steel bars 11, and then promptly pour the quickly hardening expansive concrete into the core 5 of the pipe pile 15.
[0057] 5) After the strength of the quickly hardening expansive concrete reaches 80% of the designed strength, remove the vacuum pump and retain the water guide pipe 6, and plug it during the subsequent construction of the floor slab.
[0058] The above is only the preferred embodiment of the present invention and is not used to limit the protection scope of the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A method for relieving sudden surge of pipe piles in a foundation pit, characterized by: The surge relief method comprises: A water guide pipe (6) is arranged on the pipe core (5) of the pipe pile (15), one end of the water guide pipe (6) is inserted into the pipe core (5) as a water inlet, and the other end of the water guide pipe (6) is exposed outside the pipe core (5) as a water outlet; A concrete blocking body (9) is constructed at the upper opening of the tube core (5), wherein the concrete blocking body (9) blocks the upper opening of the tube core (5), and the water conduit (6) penetrates through the concrete blocking body (9); When a sudden surge occurs in the tube core (5), the sudden surge water in the tube core (5) is discharged through the water guide pipe (6).
2. The method for relieving sudden surge of pipe piles in foundation pit according to claim 1, characterized in that: The specific construction method of the concrete barrier (9) includes: A bottom sealing plate (8) is provided at a position close to the water inlet of the water conduit (6); when the water inlet of the water conduit (6) is inserted into the tube core (5), the bottom sealing plate (8) forms a partition inside the tube core (5), thereby separating a section at the upper opening of the tube core (5) as an upper blocking section; A water pumping device is used to pump water from the water body in the pipe core (5) through the water guide pipe (6), so that the water level in the pipe core (5) drops below the bottom sealing plate (8); The pre-constructed anchoring steel bars (11) are placed in the upper blocking section of the pipe core (5), and then concrete is poured in the upper blocking section, thereby constructing the concrete blocking body (9) in the upper blocking section.
3. The method for relieving sudden surge of pipe piles in foundation pit according to claim 1, characterized in that: The surge relief method further comprises: A temporary water collection pit (1) is excavated and constructed at the bottom of the foundation pit (2), and a drainage device is provided for the temporary water collection pit (1); when a sudden surge occurs in the pipe pile (15), the water that surges out to the bottom of the foundation pit (2) is gathered in the temporary water collection pit (1), and then the drainage device is used to discharge the water in the temporary water collection pit (1) out of the foundation pit.
4. The method for relieving sudden surge of pipe piles in foundation pit according to claim 3, characterized in that: The drainage device is a drainage pipe (13) provided with a submersible pump (3); the submersible pump (3) is installed at one end of the drainage pipe (13), and the submersible pump (3) is arranged in a temporary sump (1); the other end of the drainage pipe (13) extends to a pre-constructed drainage ditch (4) outside the foundation pit.
5. The method for relieving sudden surge of pipe piles in foundation pit according to claim 1, characterized in that: The surge relief method further comprises: An external drainage ditch (4) is constructed outside the foundation pit. When a sudden surge occurs in the pipe core (5), the sudden surge water in the pipe core (5) is discharged out of the foundation pit and discharged to the external drainage ditch (4).
6. A system for dispelling sudden surge of pipe piles in foundation pit, characterized by: The sudden surge relief system comprises a concrete barrier (9) and a water conduit (6). The concrete blocking body (9) blocks the upper opening of the pipe core (5) of the pipe pile (15). The water conduit (6) penetrates through the concrete blocking body (9); When a surge occurs in the tube core (5), the surge water in the tube core (5) can be discharged through the water guide pipe (6).
7. The system for dispelling sudden surge of pipe piles in foundation pit according to claim 6, characterized in that: A bottom sealing plate (8) is provided at a position of the water guide pipe (6) close to the water inlet pipe opening, and the bottom sealing plate (8) is used to: When the water inlet of the water guide pipe (6) is inserted into the tube core (5), the bottom sealing plate (8) forms a partition inside the tube core (5), thereby separating a section at the upper opening of the tube core (5) as an upper blocking section; A water pumping device is used to pump water from the water body in the pipe core (5) through the water guide pipe (6), so that the water level in the pipe core (5) drops below the bottom sealing plate (8); The pre-constructed anchoring steel bars (11) are placed in the upper blocking section of the pipe core (5), and then concrete is poured in the upper blocking section, thereby constructing the concrete blocking body (9) in the upper blocking section.
8. The system for dispelling sudden surge of pipe piles in foundation pit according to claim 6, characterized in that: The sudden surge relief system further comprises a temporary water collection pit (1), wherein the temporary water collection pit (1) is constructed at the bottom of the foundation pit (2); a drainage device is also configured for the temporary water collection pit (1); The foundation pit bottom (2) and the drainage device are used for: when a sudden surge occurs in the pipe pile (15), the water that surges out to the foundation pit bottom (2) is gathered in a temporary water collection pit (1), and then the drainage device is used to discharge the water in the temporary water collection pit (1) out of the foundation pit.
9. The system for dispelling sudden surge of pipe piles in foundation pit according to claim 8, characterized in that: The drainage device is a drainage pipe (13) provided with a submersible pump (3); the submersible pump (3) is installed at one end of the drainage pipe (13), and the submersible pump (3) is arranged in a temporary sump (1); the other end of the drainage pipe (13) extends to a pre-constructed drainage ditch (4) outside the foundation pit.
10. The system for dispelling sudden surge of pipe piles in foundation pit according to claim 6, characterized in that: The sudden surge relief system further comprises a drainage ditch (4) outside the foundation pit, wherein the drainage ditch (4) outside the foundation pit is constructed outside the foundation pit; The drainage ditch (4) outside the foundation pit is used to discharge the surging water in the pipe core (5) out of the foundation pit and to the drainage ditch (4) outside the foundation pit when a sudden surge occurs in the pipe core (5).