Lassen steel sheet pile anti-seepage system based on precise locking opening freezing and construction method
By installing a freezing pipe system and a freezing circulation system at the interlock joint of Larssen sheet piles, combined with a monitoring and control system, local freezing of the interlock joint is achieved, solving the seepage problem caused by gaps at the interlock joint and achieving a low-cost and efficient seepage prevention effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-10
- Publication Date
- 2026-03-10
AI Technical Summary
In the prior art, gaps exist at the interlocking joints of Larssen sheet piles, leading to water seepage around the foundation pit. The prior art cannot effectively solve the seepage prevention problem of these gaps. Furthermore, the gaps at the interlocking joints of Larssen sheet piles can easily become seepage channels, causing soil erosion around the foundation pit, resulting in ground subsidence and threatening the safety of the surrounding environment.
The Larssen sheet pile seepage prevention system, based on precise freezing of the interlock joints, achieves local freezing of the interlock joints by setting up an interlock freezing pipe system, combined with a freezing circulation system and a monitoring and control system, forming ice plugs to seal the leakage path.
It achieves low-cost, high-efficiency, stable and reliable seepage prevention effect. The frozen area is precisely targeted at the source of leakage, reducing heat load, improving seepage prevention effect, and is stable and reliable.
Smart Images
Figure CN121629915A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of building construction, in particular to a Larsen steel sheet pile anti-seepage system. BACKGROUND
[0002] Larsen steel sheet pile is a mature foundation pit support structure, which is widely used due to its fast construction and reusability. However, the gap at the lock connection of Larsen steel sheet pile is an inherent technical defect. In high water level stratum, the gap at the lock connection easily becomes a seepage channel, leading to water and soil loss outside the foundation pit, causing ground subsidence and threatening the safety of the surrounding environment.
[0003] In the prior art, in order to prevent water seepage at the lock connection of Larsen steel sheet pile, the following methods are usually used: dewatering method, lock grouting method and freezing method. The dewatering method refers to large-scale extraction of underground water to lower the water level, which has high cost, easily causes regional ground subsidence and poor environmental protection. The lock grouting method injects sealing agent into the lock, but the flowability of the sealing agent slurry is difficult to control, the sealing effect is unstable, and the sealing agent is easily broken under pressure. The freezing method constructs dense vertical freezing pipes in the soil outside the steel sheet pile to form a continuous frozen soil wall, but has the disadvantages of high cost, huge energy consumption, long construction period and large influence range of frost heaving and thawing settlement.
[0004] Therefore, it has become an urgent problem in the field to provide a Larsen steel sheet pile anti-seepage system with low cost, high construction efficiency and stable reliability. SUMMARY
[0005] In view of the defects of the prior art, the purpose of the present application is to provide a Larsen steel sheet pile anti-seepage system based on precise freezing of lock and a construction method, which has low cost, high construction efficiency and stable reliability.
[0006] In order to achieve the above-mentioned purpose, the present application provides a Larsen steel sheet pile anti-seepage system based on precise freezing of lock, which comprises a Larsen steel sheet pile support wall, a lock freezing pipe system, a freezing circulation system and a monitoring control system, The Larsen steel sheet pile support wall comprises a plurality of Larsen steel sheet piles connected to each other through locks. The lock freezing pipe system is arranged at the lock connection of the Larsen steel sheet pile support wall, can locally freeze the gap at the lock connection and the surrounding area of the lock, the freezing circulation system provides low-temperature medium for the lock freezing pipe system, and the monitoring control system is arranged at the lock connection, can monitor the freezing state of the lock freezing pipe system in real time, and adjust the working state of the freezing circulation system.
[0007] Further, the lock freezing pipe system comprises a lock freezing pipe, which is embedded in the lock groove of the Larsen steel sheet pile.
[0008] Further, the lock freezing pipe is composed of a flexible metal capillary tube.
[0009] Further, the lock freezing pipe system comprises a lock freezing pipe composed of a hollow cavity in the lock of the Larssen steel sheet pile.
[0010] Further, the freezing circulation system comprises a freezing unit, a circulating pump and connecting pipelines respectively connected with each lock freezing pipe.
[0011] Further, the monitoring control system comprises point temperature sensors distributed along the locks of the Larssen steel sheet pile.
[0012] In order to achieve the above purpose, the construction method of the Larssen steel sheet pile anti-seepage system based on lock precise freezing provided by the present application comprises: Pre-installation: presetting a lock freezing pipe in the lock of each Larssen steel sheet pile to be installed; Wall installation: installing the Larssen steel sheet pile into the soil, and connecting the locks of a plurality of Larssen steel sheet piles to form a closed Larssen steel sheet pile support wall; Pipeline connection: connecting the lock freezing pipes of each Larssen steel sheet pile to the freezing circulation system through branch pipelines; Precise freezing: starting the freezing circulation system to make the low-temperature medium circulate only in the network of lock freezing pipes, and form an ice plug at the lock of each Larssen steel sheet pile to locally freeze the gap at the lock connection and the surrounding area of the lock.
[0013] The Larssen steel sheet pile anti-seepage system based on lock precise freezing and the construction method provided by the present application have the advantages that the lock freezing pipe system only freezes at the lock connection of the Larssen steel sheet pile support wall, locally freezes the gap at the lock connection and the surrounding area of the lock, has low cost and high construction efficiency, the freezing area is reduced to the lock connection, the heat load is small, the freezing efficiency is high, the freezing area precisely acts on the seepage source, blocks the seepage path, and thus the anti-seepage effect is improved, and the system is stable and reliable. BRIEF DESCRIPTION OF DRAWINGS
[0014] The present application will be further described in combination with the drawings and specific embodiments.
[0015] Figure 1 The system block diagram of the Larssen steel sheet pile anti-seepage system based on lock precise freezing provided by the present application; Figure 2 The cooperation structure diagram of the Larssen steel sheet pile and the lock freezing pipe system in the present application; Figure 3 The local enlarged view of Figure 2 ; Figure 4A schematic diagram of the cooperation structure of the Larsen steel sheet pile and the freezing circulation system in the present application. DETAILED DESCRIPTION
[0016] In order to make the technical means, creative features, purposes and effects realized by the present application easy to understand, the present application is further described below in combination with specific drawings.
[0017] Referring to Figure 1 and Figure 2 which shows one example of the Larsen steel sheet pile anti-seepage system based on lock mouth precise freezing provided by the present application.
[0018] As shown in the figure, the Larsen steel sheet pile anti-seepage system based on lock mouth precise freezing in the present example mainly comprises a Larsen steel sheet pile support wall 1, a lock mouth freezing pipe system 2, a freezing circulation system 3 and a monitoring control system 4.
[0019] The Larsen steel sheet pile support wall 1 comprises a plurality of Larsen steel sheet piles 11 connected to each other through lock mouths 12, the lock mouth freezing pipe system 2 is arranged at the lock mouth connection of the Larsen steel sheet pile support wall 1, can perform local freezing on the gap at the lock mouth connection and the area around the lock mouth, the freezing circulation system 3 provides low-temperature medium for the lock mouth freezing pipe system 2, the monitoring control system 4 is arranged at the lock mouth connection, can monitor the freezing state of the lock mouth freezing pipe system 2 in real time, and adjust the working state of the freezing circulation system 1, so as to realize local freezing on the gap at the lock mouth connection and the area around the lock mouth, with low cost, high construction efficiency, and the freezing area being reduced to the lock mouth connection, small heat load, high freezing efficiency, and the freezing area precisely acting on the seepage source, blocking the seepage path, so as to improve the anti-seepage effect and be stable and reliable.
[0020] In combination with Figures 2 to 4 The lock mouth freezing pipe system 2 comprises a lock mouth freezing pipe 21, the lock mouth freezing pipe 21 is embedded in the lock mouth 12 groove of the Larsen steel sheet pile 11, preferably, the lock mouth freezing pipe 21 is composed of a flexible metal capillary tube, such as a red copper pipe, a stainless steel hose and the like, so that the lock mouth freezing pipe 21 can adapt to the small gap at the lock mouth connection, and at the same time adapt to the temperature deformation, frost heaving deformation and deformation caused by excavation of the soil body in the freezing process, reducing the risk of pipe body damage caused by stress concentration. In specific application, before pile driving, the lock mouth freezing pipe 21 is embedded in the lock mouth 12 groove of each Larsen steel sheet pile 11 in advance, facilitating the subsequent construction of the Larsen steel sheet pile 11.
[0021] In some embodiments, a hollow cavity is formed in the lock mouth 12 of each Larsen steel sheet pile 11, so that the hollow cavity constitutes the lock mouth freezing pipe 21, so as to form an integrated structure of the lock mouth freezing pipe 21 and the Larsen steel sheet pile 11, improving the construction efficiency.
[0022] In combination with Figure 4In cooperation with the above, the refrigeration circulating system 3 comprises a refrigeration unit 31, a circulating pump 32 and connecting pipelines 33, the connecting pipelines 33 are connected with the lock freezing pipes 21 on each Larsen steel sheet pile 11 respectively, so that the refrigeration unit 31 produces low-temperature medium, the low-temperature medium is pumped by the circulating pump 32 and is delivered to the lock freezing pipes 21 along the connecting pipelines 33.
[0023] Preferably, the lock freezing pipes 21 on each Larsen steel sheet pile 11 are connected to the connecting pipelines 23 through branch pipelines, so that each lock freezing pipe 21 forms a parallel structure and ensures the uniformity of the delivery of the low-temperature medium.
[0024] Further, the refrigeration circulating system 2 further comprises a return pipeline 34, the return pipeline 34 is connected with the lock freezing pipes 21 on each Larsen steel sheet pile 11 respectively, and returns the low-temperature medium to the refrigeration unit 21 for circulation.
[0025] Therefore, the refrigeration circulating system 3 provides the lock freezing pipe system 2 with low-temperature medium, so that each lock freezing pipe 21 forms a local ice plug at the lock 12 on the corresponding Larsen steel sheet pile 11, locally freezes the lock connection and the surrounding area of the Larsen steel sheet pile support wall 1, and blocks the leakage path, which is low in cost, high in construction efficiency, small in frozen area, low in heat load and high in freezing efficiency, and the frozen area precisely acts on the leakage source to improve the anti-seepage effect and be stable and reliable.
[0026] In combination with the above, Figure 4 In order to ensure the freezing effect, the monitoring and control system 4 comprises point temperature sensors 41, which are distributed along the locks 12 of each Larsen steel sheet pile 11 to monitor the temperature data of each lock freezing pipe 21 in real time, so as to obtain the freezing state.
[0027] Further, the monitoring and control system 4 further comprises a controller, which receives the temperature data and correspondingly controls the working state of the refrigeration circulating system 2 to adjust the temperature and delivery flow of the low-temperature medium, so as to ensure the effective freezing of the lock freezing pipe 21 and ensure the effective local freezing of the lock connection and the surrounding area of the Larsen steel sheet pile support wall 1, block the leakage path, improve the anti-seepage effect and be stable and reliable.
[0028] Thus, the present application provides a The present application further provides a construction method of a Larsen steel sheet pile anti-seepage system based on lock precise freezing, and the construction method comprises the following steps: Pre-installation: presetting the lock freezing pipes 21 in the locks 12 of all to-be-set Larsen steel sheet piles 11. Specifically, the lock freezing pipes 21 of the lock freezing pipe system 2 are pre-installed in the locks 12 of all to-be-set Larsen steel sheet piles 11, or hollow cavities are preset in the locks 12 of the Larsen steel sheet piles 11 to form the lock freezing pipes 21.
[0029] Driving into wall: driving the Larsen steel sheet pile 11 into the soil, the locking port 12 of the plurality of Larsen steel sheet piles 11 is connected to each other to form a closed Larsen steel sheet pile support wall 1.
[0030] Pipeline connection: the locking port freezing pipe 21 of each Larsen steel sheet pile 11 is connected to the connecting pipe 23 of the freezing circulation system 2 through the branch pipe.
[0031] Precise freezing: start the freezing circulation system 2, so that the low-temperature medium only circulates in the network of locking port freezing pipes 21, and forms an ice plug at the locking port 12 of each Larsen steel sheet pile 11, and locally freezes the gap at the locking port connection and the surrounding area of the locking port, so as to completely block the leakage path.
[0032] Maintenance and thawing: during the excavation of the foundation pit and the main body construction, the system is maintained; after the completion of the project, stop the freezing circulation system 2, the ice plug at the locking port 12 is naturally melted or assisted thawing, and then the Larsen steel sheet pile 11 is recovered.
[0033] The Larsen steel sheet pile anti-seepage system and construction method based on precise freezing of the locking port provided by the application freeze only at the locking port connection of the Larsen steel sheet pile support wall, and locally freeze the gap at the locking port connection and the surrounding area of the locking port, which has low cost, high construction efficiency, and small freezing area, small heat load, high freezing efficiency, and precise effect on the leakage source, thereby improving the anti-seepage effect and being stable and reliable.
[0034] The above shows and describes the basic principles, main features and advantages of the application. Those skilled in the art should understand that the application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the application. Without departing from the spirit and scope of the application, various changes and improvements can be made to the application, and these changes and improvements all fall within the scope of the claimed application. The scope of protection of the application is defined by the appended claims and their equivalents.
Claims
1. A Larsen steel sheet pile impervious system based on precise freezing of lock mouth, characterized by, The application relates to a construction method of a Larsen steel sheet pile supporting wall, a locking frozen pipe system, a frozen circulation system and a monitoring control system. The Larsen steel sheet pile supporting wall comprises a plurality of Larsen steel sheet piles which are connected with each other through locking, the locking frozen pipe system is arranged at the locking connection of the Larsen steel sheet pile supporting wall, can locally freeze the gap at the locking connection and the surrounding area of the locking, the frozen circulation system provides low-temperature medium for the locking frozen pipe system, and the monitoring control system is arranged at the locking connection, can monitor the freezing state of the locking frozen pipe system in real time, and adjusts the working state of the frozen circulation system.
2. The lock-segment-precision frozen based Larsen steel sheet pile seepage prevention system according to claim 1, characterized in that, The locking frozen pipe system comprises a locking frozen pipe which is embedded in a locking groove of the Larsen steel sheet pile.
3. The lock-segment-precision frozen based Larsen steel sheet pile seepage prevention system according to claim 2, characterized in that, The locking frozen pipe is composed of a flexible metal capillary tube.
4. The lock-segment-precision frozen based Larsen steel sheet pile seepage prevention system according to claim 1, characterized in that, The locking frozen pipe system comprises a locking frozen pipe which is composed of a hollow cavity in the locking of the Larsen steel sheet pile.
5. The precision frozen lock-seam based Larsen steel sheet piling system according to claim 2 or 3, characterized in that, The frozen circulation system comprises a freezing unit, a circulating pump and connecting pipelines which are connected with the locking frozen pipes respectively.
6. The lock-segment-precision frozen based Larsen steel sheet pile seepage prevention system according to claim 1, characterized in that, The monitoring control system comprises point temperature sensors which are distributed along the lockings of the Larsen steel sheet piles.
7. The construction method of the lock-joint precision frozen-based Larsen steel sheet pile impervious system according to any one of claims 1-6, characterized in that, The construction method comprises the following steps: Pre-installation: presetting locking frozen pipes in the lockings of all the Larsen steel sheet piles to be installed; Wall forming: driving the Larsen steel sheet piles into the soil, and connecting the lockings of the Larsen steel sheet piles to form a closed Larsen steel sheet pile supporting wall; Pipeline connection: connecting the locking frozen pipes of the Larsen steel sheet piles to the frozen circulation system through branch pipelines; Precise freezing: starting the frozen circulation system, circulating the low-temperature medium in the locking frozen pipe network, forming ice plugs at the lockings of the Larsen steel sheet piles, and locally freezing the gap at the locking connection and the surrounding area of the locking.