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CN-224227869-U - Special-shaped concrete heat exchange energy pile monitoring device

CN224227869UCN 224227869 UCN224227869 UCN 224227869UCN-224227869-U

Abstract

The utility model discloses a special-shaped concrete heat exchange energy pile monitoring device which comprises an energy pile, wherein the energy pile consists of a plurality of energy pile units, heat exchange pipes are communicated in the energy pile units, the heat exchange pipes are connected with a ground source heat pump, the energy pile units comprise pile bodies and pile caps, the pile bodies consist of a plurality of branches, each branch comprises a flange and a web, an inlet communicated with the heat exchange pipes is formed in the center of each pile body, a heat exchange pipe outlet is formed in the center of each branch, a strain sensor is arranged on the pile body, an optical fiber temperature sensor is arranged in the pile body, the optical fiber strain sensor and the optical fiber temperature sensor are connected with a distributed optical fiber demodulator, longitudinal steel bars are arranged on the periphery of the pile body and surround stirrups, and the purpose of configuring the longitudinal steel bars is to resist vertical loads and surround the stirrups so as to optimize the mechanical properties of the pile. The pile foundation structure solves the problem that the pile foundation is unstable due to the fact that the existing pile body in a common shape cannot provide enough side friction in a soft soil area.

Inventors

  • GAO LEI
  • Fan Zifeng
  • WU XINYU
  • WANG YIHAO
  • YUAN ZE
  • YANG YANG

Assignees

  • 河海大学

Dates

Publication Date
20260512
Application Date
20250513

Claims (10)

  1. 1. The special-shaped concrete heat exchange energy pile monitoring device is characterized by comprising an energy pile, wherein the energy pile consists of a plurality of energy pile units, and heat exchange pipes are communicated in the energy pile units; The energy pile unit comprises a pile body (5) and a pile cap (27), wherein the pile body (5) consists of a plurality of branches, each branch comprises a flange (12) and a web (13), an inlet (14) for leading in a heat exchange tube is formed in the center of the pile body (5), and a heat exchange tube outlet (15) is formed in the center of each branch; An optical fiber strain sensor (6) is arranged on the pile body (5), and an optical fiber temperature sensor (4) is arranged in the pile body (5), wherein the optical fiber strain sensor (6) and the optical fiber temperature sensor (4) are connected with a distributed optical fiber demodulator (9); Longitudinal steel bars (18) are arranged on the periphery of the pile body (5) and hoop reinforcements (17) are arranged around the pile body.
  2. 2. The special-shaped concrete heat exchange energy pile monitoring device according to claim 1, wherein the heat exchange pipes are connected after the bottoms of the pile bodies (5) are bent.
  3. 3. The monitoring device for the heat exchange energy pile of the special-shaped concrete according to claim 1, wherein the flange is provided with a threaded sleeve connected with a pile cap (27).
  4. 4. The special-shaped concrete heat exchange energy pile monitoring device according to claim 1, wherein a rubber layer (28) is laid on the top of the pile cap (27).
  5. 5. The special-shaped concrete heat exchange energy pile monitoring device according to claim 1, wherein the inner diameter of the heat exchange pipe is smaller than 1% of the width of the flange.
  6. 6. The special-shaped concrete heat exchange energy pile monitoring device according to claim 1, wherein the outer side of the pile cap (27) is provided with a hanging ring.
  7. 7. The special-shaped concrete heat exchange energy pile monitoring device according to claim 1, wherein steel bars are arranged in the pile body (5).
  8. 8. The special-shaped concrete heat exchange energy pile monitoring device according to claim 1, wherein a triangular stirrup (19) is arranged at the center of the pile body (5).
  9. 9. The special-shaped concrete heat exchange energy pile monitoring device according to claim 1, wherein longitudinal ribs for fixing the heat exchange tubes are arranged on the heat exchange tubes.
  10. 10. The special-shaped concrete heat exchange energy pile monitoring device according to claim 1, wherein an optical fiber temperature sensor (4) and an optical fiber strain sensor (6) are arranged in a triangle which is formed by the boundary of the flange (12) and the web (13).

Description

Special-shaped concrete heat exchange energy pile monitoring device Technical Field The utility model relates to a special-shaped concrete filling pile in the field of rock soil, building and geological engineering soft soil foundation reinforcement, in particular to a special-shaped concrete heat exchange energy pile monitoring device. Background Soft soil foundation pit, high-speed bridge head changeover portion often lead to the stationarity to drop because of soft soil characteristic, and ordinary pile body can not make full use of the bearing capacity of each soil layer, can't provide sufficient side friction resistance, produces pile foundation unstability even. Therefore, the special-shaped piles are adopted to solve the problem that the common piles cannot meet the side friction resistance, and the difficulty that the bearing capacity of the foundation is insufficient is effectively solved. At present, the energy consumption for cooling and heating in urban residential buildings is continuously increased. Within 200m below the surface, a large amount of shallow geothermal energy is stored due to the better heat holding capacity of the soil. The energy underground structure can effectively utilize the part of shallow geothermal energy to realize heating and cooling of a building, and can replace conventional fossil fuel energy to relieve the current energy crisis. Most of the energy piles used in the current pile foundations are round piles, which can only provide heating or refrigerating effects for the upper structure, and the lifting effect on the bearing capacity of the foundation is not obvious. The energy pile technology is to embed the heat exchange pipe inside the pile foundation directly, transfer the excessive indoor heat to the soil in summer to cool the building and further extract the heat from the soil for heating the building in winter. The energy pile can effectively utilize the high heat conductivity and heat storage rate of concrete and has the dual functions of bearing the load on the upper part of a building and carrying out heat exchange with surrounding soil. Compared with the traditional ground source heat pump technology, the method has the advantages of reducing extra drilling cost, being good in heat transfer performance and saving underground space resources. The prior special-shaped piles have few applications, and the special-shaped piles have no heating and cooling functions on the upper structure. While the energy pile is a prefabricated part of a large building for heating and cooling, the foundation pile body is internally provided with heat exchange pipes for circulating an internal pipe system of a heat exchanger. How to arrange the heat exchange pipeline in the special-shaped pile and simultaneously provide higher pile side friction and heat exchange with soil, thereby solving the problem of foundation bearing capacity under hot and cold working conditions and needing further discussion. Disclosure of utility model The utility model aims to overcome the defects in the prior art, and provides a special-shaped concrete heat exchange energy pile monitoring device which is used for improving the sectional shape of a pile and combining a pile foundation with a ground source heat exchange system to form a special-shaped concrete energy pile, wherein the energy pile is of a special-shaped section, after the heat exchange system is added on the basis of the special-shaped concrete pile, the strain and the temperature of a pile body are monitored, the side surface area of the pile is remarkably increased, the side friction and the bearing capacity of the foundation are improved, so that the problem that the pile foundation is unstable due to the fact that the pile body of the existing common shape cannot provide enough side friction in a soft soil area is solved, and a heat exchange system is provided for the special-shaped pile, so that the special-shaped pile has corresponding heat exchange capacity under hot and cold working conditions, and the pile foundation design problem of different areas is better adapted. The special-shaped concrete heat exchange energy pile monitoring device comprises an energy pile, wherein the energy pile consists of a plurality of energy pile units, and heat exchange pipes are communicated in the energy pile units; The energy pile unit comprises a pile body and a pile cap, wherein the pile body consists of a plurality of branches, each branch comprises a flange and a web plate, the center of the pile body is provided with an inlet which is communicated with the heat exchange tube, and the center of the branch is provided with an outlet of the heat exchange tube; The pile body is provided with a strain sensor, and an optical fiber temperature sensor is arranged in the pile body; The periphery of the pile body is provided with longitudinal steel bars and hoop reinforcements, and the longitudinal steel bars are arranged to resist vertical load an