CN111636416A - Hydration heat cooling system and method for oversized-diameter cast-in-place pile - Google Patents
Hydration heat cooling system and method for oversized-diameter cast-in-place pile Download PDFInfo
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- CN111636416A CN111636416A CN202010462371.7A CN202010462371A CN111636416A CN 111636416 A CN111636416 A CN 111636416A CN 202010462371 A CN202010462371 A CN 202010462371A CN 111636416 A CN111636416 A CN 111636416A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/06—Placing concrete under water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
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Abstract
The application relates to a hydration heat cooling system and a cooling method for an oversized-diameter cast-in-place pile, relates to the technical field of deep water foundation construction, and comprises a water outlet system, a water outlet system and a water outlet system, wherein the water outlet system comprises an outer steel pipe which is vertically inserted into the center of the cast-in-place pile, the outer steel pipe is used for outputting refrigerant liquid from the top end of the outer steel pipe, and the bottom end of the outer steel pipe is closed; the water inlet system comprises an inner steel pipe used for inputting refrigerant liquid from the top end, and the inner steel pipe is coaxially inserted into the outer steel pipe; the bottom end of the inner steel pipe is communicated, and a certain gap is formed between the bottom end of the inner steel pipe and the inner bottom surface of the outer steel pipe. The application also discloses a cooling method based on the cooling system, and the application solves the technical problem that hydration heat in the pouring process of the cast-in-place pile with the ultra-large diameter causes adverse effects on pile quality in the prior art.
Description
Technical Field
The application relates to the technical field of deepwater foundation construction, in particular to a hydration heat cooling system and a cooling method for an oversized-diameter cast-in-place pile.
Background
At present, according to the situation of national development strategy, the construction of large-scale projects such as cross-sea bridges, offshore wind power, offshore drilling platforms and the like in China is gradually promoted from coast to deep sea. The severe deep sea environment brings great challenges to the construction of ocean engineering, and is particularly reflected in the design and construction aspects of deep water foundations. Hurricanes, rapids, deep water, strong waves, rugged seabed terrain and the like are all difficult problems which must be overcome when the deep water foundation of the ocean engineering is developed forwards.
The most remarkable characteristic of the deep water foundation of the ocean engineering is that huge horizontal forces need to be borne, including crosswind load, wave flow force, ship collision force, seismic force and the like of an upper structure, and the horizontal forces are all key factors influencing the design of the deep water foundation. In order to meet the requirements of horizontal bearing capacity and horizontal rigidity of a deep water foundation, the scheme of the cast-in-place pile usually needs to adopt a pile foundation with an ultra-large diameter. The maximum single pile diameter of the cast-in-place pile at present in China reaches
In order to adapt to the development of ocean engineering, the construction conditions are facedIn a severe deep sea environment, an ultra-large diameter pile foundation with the diameter of a single pile exceeding 5m or more is used.
However, in the oversized-diameter cast-in-place pile, because the area of a single pile is too large, the temperature difference between the inside and the outside of the surface of the pile body and the core of the pile body is large due to the influence of hydration heat in the process of pouring concrete of the pile body, the pile body is easy to crack, and the pile forming quality is difficult to ensure.
Disclosure of Invention
The embodiment of the application provides a hydration heat cooling system and a hydration heat cooling method for an oversized-diameter cast-in-place pile, and solves the technical problem that hydration heat in the cast-in-place pile casting process in the prior art causes adverse effects on pile quality.
In a first aspect, the present application provides a hydration heat cooling system for an oversized-diameter bored concrete pile, comprising:
the water outlet system comprises an outer steel pipe vertically inserted into the center of the cast-in-place pile, the outer steel pipe is used for outputting refrigerant liquid from the top end of the outer steel pipe, and the bottom end of the outer steel pipe is closed;
the water inlet system comprises an inner steel pipe used for inputting refrigerant liquid from the top end, and the inner steel pipe is coaxially inserted into the outer steel pipe; the bottom end of the inner steel pipe is communicated, and a certain gap is formed between the bottom end of the inner steel pipe and the inner bottom surface of the outer steel pipe.
In some embodiments, the water inlet system further comprises a water inlet pipe, the water inlet pipe is communicated with the inner steel pipe, and the water inlet pipe is provided with a water pump;
the water outlet system further comprises a water outlet pipe, the water outlet pipe extends outwards from the side wall of the top end of the outer steel pipe, and a valve is mounted on the water outlet pipe.
In some embodiments, the cooling system further comprises a sealing joint, which is sleeved outside the inner steel tube and is fixedly installed at the top end of the outer steel tube.
In some embodiments, the sealing joint is provided with a switchable vent hole, and the vent hole is communicated with the outer steel pipe when the sealing joint is opened.
In some embodiments, a plurality of groups of lug ribs for limiting are arranged on the outer surface of the inner steel pipe, and the plurality of groups of lug ribs are vertically arranged at equal intervals; each group of ear ribs at least comprises three ear ribs which are uniformly distributed on the outer surface of the inner steel pipe at equal angles.
In some embodiments, the cooling system further comprises a support rod and a horizontal ring for supporting the outer steel pipe, the horizontal ring is fixedly arranged inside a reinforcement cage of the cast-in-place pile, and the plurality of horizontal rings are arranged at equal intervals from top to bottom; one end of the supporting rod is fixed on the side wall of the outer steel pipe, the other end of the supporting rod is fixed on the steel reinforcement cage, and the supporting rods are horizontally and obliquely arranged in a crossed mode.
In some embodiments, the refrigerant liquid is seawater, the water inlet of the water inlet pipe is disposed below a low sea level, and the water outlet of the water outlet pipe is disposed above a high sea level.
In a second aspect, the application further provides a cooling method based on the hydration heat cooling system for the oversized-diameter cast-in-place pile, and the cooling method comprises the following steps:
s1, vertically inserting and fixing the outer steel pipe in the center of the drill hole of the cast-in-place pile;
s2, coaxially inserting and fixing the inner steel pipe into the outer steel pipe;
s3, pouring concrete of the cast-in-place pile, inputting coolant liquid from the top end of the inner steel pipe, and outputting the coolant liquid from the top end of the outer steel pipe;
s4: and (3) solidifying the concrete of the cast-in-place pile 5, and dismantling and removing the parts of the water inlet system and the water outlet system, which are positioned above the top surface of the cast-in-place pile 5.
In some embodiments, the water inlet system further comprises a water inlet pipe, the water inlet pipe is communicated with the inner steel pipe, and the water inlet pipe is provided with a water pump;
the water outlet system also comprises a water outlet pipe, the water outlet pipe extends outwards from the side wall of the top end of the outer steel pipe, and a valve is arranged on the water outlet pipe;
the cooling system also comprises a support rod and horizontal rings, the support rod and the horizontal rings are used for supporting the outer steel pipe, the horizontal rings are fixedly arranged on the inner side of a reinforcement cage of the cast-in-place pile, and the horizontal rings are arranged at equal intervals from top to bottom; one end of each support rod is fixed on the side wall of the outer steel pipe, the other end of each support rod is fixed on the steel reinforcement cage, and the plurality of support rods are arranged in a horizontal and inclined crossed mode;
in step S1, welding an outer steel pipe to a reinforcement cage of the cast-in-place pile through a support rod and a horizontal ring, and then integrally lowering the outer steel pipe into a bore of the cast-in-place pile;
in step S3, the water pump and the valve are opened, the coolant liquid is input into the inner steel pipe through the water inlet pipe, and is output through the outer steel pipe and the water outlet pipe until the concrete is solidified, and the water pump and the valve are closed.
In some embodiments, the cooling system further comprises a sealing joint, wherein the sealing joint is provided with a switchable vent hole, and the vent hole is communicated with the outer steel pipe when the sealing joint is opened;
in step S2, a sealing joint is sleeved outside the inner steel tube and mounted on the top end of the outer steel tube;
in step S3, the valve is closed first, and the vent hole of the sealing joint is opened; when concrete of the cast-in-place pile is to be poured, a water pump is started to input refrigerant liquid; and when the refrigerant liquid overflows from the vent hole, closing the vent hole and opening the valve.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a hydration heat cooling system and a cooling method for an oversized-diameter cast-in-place pile, wherein the cooling system comprises a water outlet system and a water inlet system, refrigerant liquid is input into an inner steel pipe through the water inlet system, and the refrigerant liquid is output through the water outlet system, so that the purpose of heat exchange and cooling is achieved, the adverse effect of hydration heat on pile forming quality in the casting process of the oversized-diameter cast-in-place pile is reduced, the quality of the cast-in-place pile is improved, and the cracking risk of the cast-in-place pile is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a cooling system provided in an embodiment of the present application;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
the reference numbers are 1 a-water inlet pipe, 1 b-water pump, 1 c-inner steel pipe, 1 d-sealing joint and 1 e-ear rib; 2 a-an outer steel pipe, 2 b-a valve and 2 c-a water outlet pipe; 3 a-inner brace rod, 3 b-horizontal ring; 4-a reinforcement cage; and 5-pouring the pile.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a hydration heat cooling system for an oversized-diameter cast-in-place pile, which can solve the technical problem that hydration heat causes adverse effects on pile quality in the casting process of the oversized-diameter cast-in-place pile in the prior art.
As shown in fig. 1, a hydration heat cooling system for an oversized-diameter cast-in-place pile comprises a water outlet system and a water inlet system, wherein the water outlet system comprises an outer steel pipe 2a, the outer steel pipe 2a is vertically inserted in the center of the cast-in-place pile 5, the outer steel pipe 2a is used for outputting refrigerant liquid from the top end of the outer steel pipe, and the bottom end of the outer steel pipe 2a is closed. The water inlet system comprises an inner steel pipe 1c, the inner steel pipe 1c is used for inputting refrigerant liquid from the top end, and the inner steel pipe 1c is coaxially inserted into the outer steel pipe 2 a; the bottom end of the inner steel tube 1c is through, and a certain gap is formed between the bottom end of the inner steel tube and the inner bottom surface of the outer steel tube 2 a.
The outer diameter of the inner steel pipe 1c is smaller than the inner diameter of the outer steel pipe 2a, the outer steel pipe 2a and the inner steel pipe 1c form an inner and outer sleeve structure, and the bottoms of the two are communicated. The coolant liquid is input to the center of the cast-in-place pile through the inner steel pipe 1c until the bottom of the cast-in-place pile, then flows upwards through the gap between the inner steel pipe 1c and the pipe wall of the outer steel pipe 2a until flowing out from the top end of the outer steel pipe 2a, and therefore the purpose of cooling hydration heat is achieved. The refrigerant liquid can be various special refrigerant reagents, and can also be seawater and fresh water.
Specifically, the water inlet system also comprises a water inlet pipe 1a, the water inlet pipe 1a is communicated with the inner steel pipe 1c, a water pump 1b is installed on the water inlet pipe 1a, and the water pump 1b provides power for liquid flowing of the whole cooling system. The water outlet system further comprises a water outlet pipe 2c, the water outlet pipe 2c extends outwards from the side wall of the outer steel pipe 2a, specifically, extends outwards from the side wall of the top end of the outer steel pipe 2a, and a valve 2b is mounted on the water outlet pipe 2 c. The water inlet pipe 1a and the water outlet pipe 2c can better realize the input and output of the refrigerant liquid.
In this embodiment, the water inlet pipe 1a is in an inverted L shape, and includes a horizontal pipe and a vertical pipe, the horizontal pipe is connected to the inner steel pipe 1c, the water pump 1b is disposed on the horizontal pipe, and the vertical pipe is used for more conveniently conveying the refrigerant liquid. Preferably, the water inlet pipe 1a and the water outlet pipe 2c are in the same plane and are oppositely arranged.
In this embodiment, the cooling system further includes a sealing joint 1d, and the sealing joint 1d is sleeved outside and fixedly installed at the top end of the outer steel tube 2 a. The sealing joint 1d not only can play a role in fixing the outer steel pipe 2a and the inner steel pipe 1c, but also can play a role in sealing, and provides a good environment for the flowing of refrigerant liquid of a cooling system.
Furthermore, the sealing joint 1d is provided with a switchable vent hole, the vent hole is communicated with the outer steel pipe 2a when opened, and a good flowing environment can be provided for refrigerant liquid by opening and closing the sealing joint 1 d.
As shown in fig. 1 and 2, a plurality of sets of ear ribs 1e for limiting are arranged on the outer surface of the inner steel pipe 1c, and the plurality of sets of ear ribs 1e are vertically arranged at equal intervals; each group of ear ribs 1e at least comprises three ear ribs which are uniformly distributed on the outer surface of the inner steel pipe 1c at equal angles.
Preferably, the ear ribs 1e are welded on the outer wall of the inner steel pipe 1c, the side ends of the ear ribs and the inner wall of the outer steel pipe keep a 2cm distance, each group of ear ribs 1e comprises three ear ribs 1e, and an angle between every two ear ribs is 120 degrees. Preferably, the ear rib 1e is formed by bending a steel bar, and the ear rib 1e is arc-shaped or isosceles trapezoid without a bottom.
Specifically, the cooling system further comprises a supporting rod 3a and a horizontal ring 3b which are used for supporting the outer steel pipe 2a, the supporting rod 3a and the horizontal ring 3b are fixed with a reinforcement cage 4 of the cast-in-place pile into a whole, and the whole body is lowered in the construction process. Horizontal ring 3b is fixed to be set up in 4 inboards of steel reinforcement cage of bored concrete pile 5, and a plurality of horizontal rings 3b are equidistant from top to bottom and are arranged, and horizontal ring 3b is used for consolidating steel reinforcement cage 4, still is used for accepting whole cooling system simultaneously. One end of each support rod 3a is fixed on the side wall of the outer steel pipe 2a, the other end of each support rod is fixed on the steel reinforcement cage 4, and the plurality of support rods 3a are arranged in a horizontal and inclined crossed mode. The horizontal support rods 3a and the inclined support rods 3a are regularly arranged between the reinforcement cage 4 and the outer steel tube 2 a. Preferably, the vertical distance between any two adjacent horizontal rings 3b is 2-3 m.
Preferably, the refrigerant liquid is seawater, and a water inlet of the water inlet pipe 1a (the tail end of a vertical pipe of the water inlet pipe 1a) is arranged below a low sea level, so that the seawater is pumped and input; the water outlet of the water outlet pipe 2c is arranged above the high tide level of the seawater, so that the seawater can be extracted and output conveniently.
Preferably, the gap between the bottom end surface of the inner steel tube 1c and the inner bottom surface of the outer steel tube 2a is 20 cm.
Preferably, as shown in fig. 1, the ratio D2/D1 of the diameter of the outer steel tube 2a to the diameter of the cast-in-place pile is 1/5, and the bottom end surface of the outer steel tube 2a is kept at a distance H from the bottom surface of the cast-in-place pile, where the distance H is equal to 1 tube diameter D2. The two dimensional data are verified by engineering practice, so that a good hydration heat cooling effect can be achieved on the premise of saving materials, and the optimal design is achieved.
The cooling system of this application contains water outlet system and water inlet system, inputs refrigerant liquid through the inside steel pipe of water inlet system to through water outlet system output, reached the purpose of heat transfer cooling, reduced the bored concrete pile and pour the adverse effect that the in-process hydration heat led to the fact the stake quality, promoted the quality of bored concrete pile, reduced the risk of bored concrete pile fracture. The cooling system has the advantages of simple structure and convenience in construction, can effectively reduce the internal and external temperature difference of the cast-in-place pile, is particularly suitable for the cast-in-place pile with the super-large diameter, and reduces the influence of hydration heat on the quality of the concrete of the pile body.
When the seawater is used as the refrigerant liquid, the existing seawater resource can be directly used, and additional refrigerant liquid does not need to be configured, so that the construction cost is further reduced.
The application also discloses a cooling method based on the cooling system, which comprises the following steps:
s1, vertically inserting and fixing the outer steel pipe 2a in the center of the drill hole of the cast-in-place pile 5;
s2, inserting and fixing the inner steel tube 1c into the outer steel tube 2a coaxially;
s3, pouring concrete of the cast-in-place pile 5, inputting coolant liquid from the top end of the inner steel pipe 1c, and outputting the coolant liquid from the top end of the outer steel pipe 2 a;
s4: the concrete of the cast-in-place pile 5 is set and the water inlet system and the part of the water outlet system located above the top surface of the cast-in-place pile 5 are removed and removed. In this embodiment, the entire water intake system and the part above the water surface of the water outlet system are removed.
Furthermore, the cooling system also comprises a support rod 3a and a horizontal ring 3b for supporting the outer steel pipe 2a, the horizontal ring 3b is fixedly arranged at the inner side of a reinforcement cage 4 of the cast-in-place pile 5, and the plurality of horizontal rings 3b are arranged at equal intervals from top to bottom; one end of each support rod 3a is fixed on the side wall of the outer steel pipe 2a, the other end of each support rod is fixed on the steel reinforcement cage 4, and the plurality of support rods 3a are arranged in a horizontal and inclined crossed mode.
In step S1, the outer steel tube 2a is welded to the reinforcement cage 4 of the cast-in-place pile 5 via the support rod 3a and the horizontal ring 3b, and then the entire steel tube is lowered into the bore of the cast-in-place pile 5. Compared with the existing reinforcement cage 4 constructed section by section on site, the cooling method not only improves the integrity and rigidity of the reinforcement cage 4, but also leads the process of lengthening the reinforcement cage 4 section by section, shortens the site operation time, and greatly improves the construction efficiency especially in the marine environment.
The water inlet system also comprises a water inlet pipe 1a, the water inlet pipe 1a is communicated with the inner steel pipe 1c, and the water inlet pipe 1a is provided with a water pump 1 b; the water outlet system also comprises a water outlet pipe 2c, the water outlet pipe 2c extends outwards from the side wall of the outer steel pipe 2a, and a valve 2b is arranged on the water outlet pipe 2 c.
In step S3, the water pump 1b and the valve 2b are turned on, the refrigerant liquid is input into the inner steel pipe 1c through the water inlet pipe 1a, and is output through the outer steel pipe 2a and the water outlet pipe 2c until the concrete is solidified, and the water pump 1b and the valve 2b are turned off.
Specifically, the cooling system further comprises a sealing joint 1d, wherein the sealing joint 1d is provided with a switchable vent hole, and the vent hole is communicated with the outer steel pipe 2a when the sealing joint 1d is opened;
in step S2, the sealing joint 1d is fitted around the outer end of the inner steel pipe 1c and attached to the top end of the outer steel pipe 2 a; in step S3, the valve 2b is closed first, and the vent hole of the sealing joint 1d is opened; when concrete of the cast-in-place pile 5 is to be poured, a water pump 1b is started to input refrigerant liquid; when the refrigerant liquid overflows from the vent hole, the vent hole is closed and the valve 2b is opened. The air holes of the sealing joint 1d can enable the cooling system to be filled with the refrigerant liquid more quickly and better in the initial operation process, so that the hydration heat cooling efficiency is improved.
In step S4, the water inlet system and the part of the water outlet system above the top surface of cast-in-place pile 5 are removed and removed until the concrete of cast-in-place pile 5 is set. Specifically, the water inlet pipe 1a, the water pump 1b, the inner steel pipe 1c, the sealing joint 1d, the valve 2b and the water outlet pipe 2c are detached, and all the parts can be reused, so that the cost is saved.
According to the cooling method, the water inlet system introduces the refrigerant liquid into the center of the cast-in-place pile, the refrigerant liquid is discharged through the water outlet system to form a liquid loop, and the refrigerant liquid takes away hydration heat generated by concrete of the cast-in-place pile when passing through the outer steel pipe, so that the cooling purpose is achieved, and adverse effects of the hydration heat on the quality of the pile body concrete of the cast-in-place pile with the ultra-large diameter are reduced.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A hydration heat cooling system for an oversized-diameter bored concrete pile, comprising:
the water outlet system comprises an outer steel pipe (2a) vertically inserted into the center of the cast-in-place pile (5), the outer steel pipe (2a) is used for outputting refrigerant liquid from the top end of the outer steel pipe, and the bottom end of the outer steel pipe (2a) is closed;
the water inlet system comprises an inner steel pipe (1c) used for inputting refrigerant liquid from the top end, and the inner steel pipe (1c) is coaxially inserted into the outer steel pipe (2 a); the bottom end of the inner steel pipe (1c) is communicated, and a certain gap is formed between the bottom end of the inner steel pipe (1c) and the inner bottom surface of the outer steel pipe (2 a).
2. The hydration heat cooling system for an oversized-diameter cast-in-place pile as recited in claim 1, wherein: the water inlet system also comprises a water inlet pipe (1a), the water inlet pipe (1a) is communicated with the inner steel pipe (1c), and the water inlet pipe (1a) is provided with a water pump (1 b);
the water outlet system further comprises a water outlet pipe (2c), the water outlet pipe (2c) extends outwards from the side wall of the top end of the outer steel pipe (2a), and a valve (2b) is mounted on the water outlet pipe (2 c).
3. The hydration heat cooling system for an oversized-diameter cast-in-place pile as recited in claim 2, wherein: the cooling system further comprises a sealing joint (1d), wherein the sealing joint (1d) is sleeved outside the inner steel pipe (1c) and fixedly installed at the top end of the outer steel pipe (2 a).
4. A hydration heat cooling system for an oversized-diameter cast-in-place pile, according to claim 3, wherein: the sealing joint (1d) is provided with a switchable vent hole, and the vent hole is communicated with the outer steel pipe (2a) when the sealing joint is opened.
5. The hydration heat cooling system for an oversized-diameter cast-in-place pile as recited in claim 2, wherein: a plurality of groups of ear ribs (1e) for limiting are arranged on the outer surface of the inner steel pipe (1c), and the ear ribs (1e) are vertically arranged at equal intervals; each group of ear ribs (1e) at least comprises three ear ribs, and the ear ribs are uniformly distributed on the outer surface of the inner steel pipe (1c) at equal angles.
6. The hydration heat cooling system for an oversized-diameter cast-in-place pile as recited in claim 2, wherein: the cooling system further comprises a supporting rod (3a) and a horizontal ring (3b) which are used for supporting the outer steel pipe (2a), the horizontal ring (3b) is fixedly arranged on the inner side of a reinforcement cage (4) of the cast-in-place pile (5), and the horizontal rings (3b) are arranged at equal intervals from top to bottom; one end of the support rod (3a) is fixed on the side wall of the outer steel pipe (2a), the other end of the support rod is fixed on the reinforcement cage (4), and the support rods (3a) are horizontally and obliquely arranged in a crossed mode.
7. The hydration heat cooling system for an oversized-diameter cast-in-place pile as recited in any one of claims 2-6, wherein: the refrigerant liquid is seawater, a water inlet of the water inlet pipe (1a) is arranged below a low sea level, and a water outlet of the water outlet pipe (2c) is arranged above a high sea level.
8. A cooling method of a hydration heat cooling system for an oversized-diameter cast-in-place pile based on the method as recited in claim 1, comprising the following steps:
s1, vertically inserting and fixing the outer steel pipe (2a) in the center of the drill hole of the cast-in-place pile (5);
s2, coaxially inserting and fixing the inner steel pipe (1c) into the outer steel pipe (2 a);
s3, pouring concrete of the cast-in-place pile (5), inputting coolant liquid from the top end of the inner steel pipe (1c), and outputting the coolant liquid from the top end of the outer steel pipe (2 a);
s4: and (3) solidifying the concrete of the cast-in-place pile (5), and dismantling and removing the water inlet system and the part of the water outlet system, which is positioned above the top surface of the cast-in-place pile (5).
9. The cooling method of the hydration heat cooling system for an oversized-diameter cast-in-place pile as recited in claim 8, wherein: the water inlet system also comprises a water inlet pipe (1a), the water inlet pipe (1a) is communicated with the inner steel pipe (1c), and the water inlet pipe (1a) is provided with a water pump (1 b);
the water outlet system also comprises a water outlet pipe (2c), the water outlet pipe (2c) extends outwards from the side wall of the top end of the outer steel pipe (2a), and a valve (2b) is mounted on the water outlet pipe (2 c);
the cooling system further comprises a supporting rod (3a) and a horizontal ring (3b) which are used for supporting the outer steel pipe (2a), the horizontal ring (3b) is fixedly arranged on the inner side of a reinforcement cage (4) of the cast-in-place pile (5), and the horizontal rings (3b) are arranged at equal intervals from top to bottom; one end of each support rod (3a) is fixed to the side wall of the outer steel pipe (2a), the other end of each support rod is fixed to the corresponding reinforcement cage (4), and the support rods (3a) are arranged in a horizontal and inclined crossed mode;
in step S1, welding the outer steel pipe (2a) to the reinforcement cage (4) of the cast-in-place pile (5) through the support rod (3a) and the horizontal ring (3b), and then integrally lowering the outer steel pipe into the drilled hole of the cast-in-place pile (5);
in step S3, the water pump (1b) and the valve (2b) are turned on, refrigerant liquid is introduced into the inner steel pipe (1c) through the water inlet pipe (1a), and discharged through the water outlet pipe (2c) through the outer steel pipe (2a) until the concrete is solidified, and the water pump (1b) and the valve (2b) are turned off.
10. The cooling method of the hydration heat cooling system for an oversized-diameter cast-in-place pile as recited in claim 9, wherein: the cooling system also comprises a sealing joint (1d), wherein the sealing joint (1d) is provided with a switchable vent hole, and the vent hole is communicated with the outer steel pipe (2a) when the sealing joint (1d) is opened;
in step S2, a sealing joint (1d) is fitted around the outer surface of the inner steel pipe (1c) and attached to the top end of the outer steel pipe (2 a);
in step S3, the valve (2b) is closed first, and the vent hole of the sealing joint (1d) is opened; when concrete of the cast-in-place pile (5) is to be poured, a water pump (1b) is started to input refrigerant liquid; when the refrigerant liquid overflows from the vent hole, the vent hole is closed and the valve (2b) is opened.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113585243A (en) * | 2021-08-11 | 2021-11-02 | 中铁大桥局集团有限公司 | Cast-in-situ bored pile and construction method thereof |
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| JP2007321383A (en) * | 2006-05-31 | 2007-12-13 | Tekken Constr Co Ltd | Heat-exchange excavated pile and snow-melting equipment utilizing geothermal heat |
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| CN205878666U (en) * | 2016-08-16 | 2017-01-11 | 郑州沃德空调有限公司 | Bury stake of formula heat transfer energy |
| CN111042112A (en) * | 2019-11-27 | 2020-04-21 | 中建七局第四建筑有限公司 | Novel pipe distribution type drilling and pouring energy pile and construction method thereof |
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| JP2007321383A (en) * | 2006-05-31 | 2007-12-13 | Tekken Constr Co Ltd | Heat-exchange excavated pile and snow-melting equipment utilizing geothermal heat |
| CN202501648U (en) * | 2011-12-31 | 2012-10-24 | 徐霆生 | Ground source or water source cooling and heating system for onshore or offshore wind power generation facilities |
| CN205878666U (en) * | 2016-08-16 | 2017-01-11 | 郑州沃德空调有限公司 | Bury stake of formula heat transfer energy |
| CN111042112A (en) * | 2019-11-27 | 2020-04-21 | 中建七局第四建筑有限公司 | Novel pipe distribution type drilling and pouring energy pile and construction method thereof |
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