WO2021073208A1 - 基坑抢险注浆控温装置及其应用方法 - Google Patents

基坑抢险注浆控温装置及其应用方法 Download PDF

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WO2021073208A1
WO2021073208A1 PCT/CN2020/107258 CN2020107258W WO2021073208A1 WO 2021073208 A1 WO2021073208 A1 WO 2021073208A1 CN 2020107258 W CN2020107258 W CN 2020107258W WO 2021073208 A1 WO2021073208 A1 WO 2021073208A1
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temperature
grouting
foundation pit
control device
temperature control
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PCT/CN2020/107258
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English (en)
French (fr)
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汪思满
陈荣
张余星
程荣华
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上海建工二建集团有限公司
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Publication of WO2021073208A1 publication Critical patent/WO2021073208A1/zh

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water

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  • the invention relates to the technical field of foundation pit leakage prevention, in particular to a foundation pit emergency grouting temperature control device and an application method thereof.
  • the conventional method of plugging the ground connecting wall mainly adopts methods such as rapid cement grouting, but the construction period of this method is relatively long, and it is difficult to meet the requirements in the event of high pressure, large water flow and other emergencies.
  • the problem with polyurethane plugging is that it is not suitable for plugging in low-temperature environments. For example, during the rescue process of foundation pits in winter, the ambient temperature is lower than 5°C. After the polyurethane contacts with moisture, the curing speed becomes slower, and it is often washed by water. If the leakage is dilute, the plugging effect becomes worse.
  • the purpose of the present invention is to provide a foundation pit rescue grouting temperature control device and an application method thereof, so as to solve the problem of slow curing speed of polyurethane for foundation pit rescue under the low-temperature environment using the prior art.
  • the present invention provides a foundation pit emergency grouting temperature control device, which is suitable for foundation pit emergency grouting temperature control in a low temperature environment.
  • the foundation pit emergency grouting temperature control device includes: a temperature controller, A heating component and a temperature sensor respectively connected to the temperature controller, and the temperature controller controls the temperature at which the heating component heats the grouting pipe according to the temperature of the grouting pipe sensed by the temperature sensor.
  • the foundation pit rescue grouting temperature control device further includes a sleeve, which is arranged on the outer side of the grouting pipe to seal the heating component and the temperature sensor.
  • the specification of the grouting pipe is The wall thickness of the pipe is 2mm; the specification of the casing is The wall thickness of the tube is 1.8mm.
  • the heating component is an electric heating belt, and the electric heating belt is spirally wound and fixed on the outer wall of the grouting pipe.
  • the temperature sensor is arranged in the grouting pipe.
  • the temperature controller controls the temperature reached by the heating component to heat the grouting pipe to 25°C.
  • the operating temperature range of the heating component and the temperature sensor is: -40°C to 85°C.
  • the temperature control device for emergency grouting for foundation pits further includes a power source, and the heating component, the temperature sensor, and the temperature controller are all connected to the power source.
  • the present invention also provides an application method of a foundation pit emergency grouting temperature control device.
  • the application method of the foundation pit emergency grouting temperature control device includes the following steps:
  • the temperature controller of the foundation pit emergency grouting temperature control device controls the temperature reached by the heating component to heat the grouting pipe according to the temperature of the grouting pipe sensed by the temperature sensor.
  • the process of installing the foundation pit emergency grouting temperature control device on the grouting pipe is as follows:
  • a sleeve is sleeved on the outer side of the grouting pipe to seal the heating component and the temperature sensor.
  • the temperature controller controls the temperature reached by the heating component to heat the grouting pipe to 25°C.
  • the temperature of the polyurethane in the grouting pipe can be increased in a low temperature environment, the curing speed of the polyurethane in contact with moisture can be increased, and the foundation can be effectively solved in a low temperature environment.
  • the foundation pit emergency grouting temperature control device of the present invention has the performance of convenient operation, simple installation and maintenance, quickness, safety and no pollution.
  • Figure 1 is a schematic structural diagram of a foundation pit emergency grouting temperature control device in an embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of a temperature control device for grouting for foundation pit rescue in the present invention.
  • the foundation pit emergency grouting temperature control device includes: a temperature controller 10, a heating component connected to the temperature controller 10 and a temperature sensor 12, the temperature controller 10 according to the The temperature of the grouting pipe 20 sensed by the temperature sensor 12 controls the temperature reached by the heating component to heat the grouting pipe 20.
  • the temperature control device for foundation pit rescue grouting of the present invention is suitable for the polyurethane plugging process of foundation pit rescue in a low temperature environment.
  • the heating component is mainly used to heat the grouting pipe 20 to increase the temperature of the grouting pipe 20, thereby increasing the grouting pipe 20.
  • the temperature of polyurethane increases the curing speed of polyurethane in contact with moisture, and effectively solves the problem of slow curing speed of polyurethane for foundation pit rescue in low temperature environment.
  • the temperature controller 10 is used to control the heating temperature and effectively control the heating time node, so as to avoid the danger of preheating polyurethane in advance (because the transportation and storage of polyurethane are packaged in sealed plastic barrels, heating is prone to explosion), reducing the occurrence of polyurethane The explosion has caused environmental pollution and is safe and reliable.
  • the heating component is an electric heating belt 11, which is spirally wound and fixed on the outer wall of the grouting pipe 20;
  • the temperature sensor 12 includes But it is not limited to being arranged in the grouting pipe 20, as long as the temperature of the grouting pipe 20 is sensed.
  • the electric heating belt 11 is wound on the outer wall of the grouting pipe 20 in a spiral manner, and the winding pitch is determined according to Atlas 03S401 of the "Pipeline Electric Heating Cable Winding Installation Table".
  • the heating belt 11 occupies the grouting pipe after being wound.
  • the length of 20 is less than 100m.
  • Electric heating belt 11 has the following advantages: uniform heating temperature, no overheating, safe and reliable; energy saving, low operating cost; intermittent operation, rapid heating start, therefore, electric heating belt 11 is used as the heating of the foundation pit rescue grouting temperature control device
  • the components are the most safe and reliable.
  • the operating temperature range of the heating component and the temperature sensor is: -40°C to 85°C; the temperature controller controls the heating component to heat the grouting pipe to reach a temperature of 25°C, because the polyurethane The chain extension and crosslinking reaction occurs after encountering water.
  • the best ambient temperature is 25°C, the curing takes only ten seconds.
  • the foundation pit emergency grouting temperature control device further includes a sleeve 13 arranged on the outside of the grouting pipe 20 to seal the heating component and the temperature sensor 12, and its purpose It is to prevent water, mud, etc. from entering the casing 13, causing short circuit or failure of the heating component and the temperature sensor 12. It is understandable that the sealing and sealing of the heating component and the temperature sensor 12 here is not completely sealed, and the two ends of the sealed casing 13 will expose the joints of the heating component and the temperature sensor 12 so as to be connected to the casing. 13 The external temperature controller 10 is connected.
  • the specification of the grouting pipe is The wall thickness of the pipe is 2mm, and the maximum pressure that can resist is 0.3Mpa; the specification of the casing is The wall thickness of the pipe is 1.8mm, and the inside is coated with thermal insulation paint.
  • the foundation pit emergency grouting temperature control device further includes a power source, and the heating component, the temperature sensor, and the temperature controller are all connected to the power source, and the power source is 220V for supplying the temperature sensor And the temperature controller provides energy.
  • this embodiment also provides an application method of a foundation pit emergency grouting temperature control device.
  • the heating component is an electric heating belt 11 as an example to describe in detail the application method of the foundation pit emergency grouting temperature control device of this embodiment.
  • the application method of the foundation pit emergency grouting temperature control device specifically includes the following step:
  • step S1 to install a foundation pit emergency grouting temperature control device on the grouting pipe 20;
  • the electric heating belt 11 is wound and fixed in a spiral manner on the outer wall of the grouting pipe 20, and a temperature sensor 12 is installed to monitor the temperature of the grouting pipe 20 in real time; then, the electric heating belt and the temperature sensor 12 are installed After finishing, put it on the outside The two ends of the tube are exposed to the sealing sleeve of the electric heating band, so as to effectively prevent water, mud, etc. from entering the casing, causing the electric heating band and the temperature sensor 12 to short-circuit or malfunction; finally, the electric heating belt 11, temperature sensor 12, and temperature control The heater is connected to the power source, and the connectors of the heating belt and the temperature sensor 12 are connected to the temperature controller 10 respectively.
  • step S2 using the temperature controller 10 of the foundation pit emergency grouting temperature control device to control the temperature at which the heating component heats the grouting pipe 20 according to the temperature of the grouting pipe 20 sensed by the temperature sensor 12
  • the temperature controller controls the temperature reached by the heating component to heat the grouting pipe 20 to be 25°C.
  • the foundation pit emergency grouting temperature control device includes a temperature controller, a heating component connected to the temperature controller, and A temperature sensor, the temperature controller controls the temperature at which the heating component heats the grouting pipe according to the temperature of the grouting pipe sensed by the temperature sensor, so that the temperature of the polyurethane in the grouting pipe in a low-temperature environment is
  • the improvement improves the curing speed of polyurethane in contact with moisture, and effectively solves the problem of slow curing speed of polyurethane for foundation pit rescue in low temperature environment; in addition, because the temperature controller can control the heating temperature and effectively control the heating time node, so as to avoid polyurethane in advance The danger of preheating reduces the impact on the environment.
  • the foundation pit emergency grouting temperature control device of the present invention has the performance of convenient operation, simple installation and maintenance, quickness, safety and no pollution.

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Abstract

一种基坑抢险注浆控温装置及其应用方法，所述基坑抢险注浆控温装置包括温度控制器(10)、与所述温度控制器(10)分别连接的加热部件和温度感应器(12)，所述温度控制器(10)根据所述温度感应器(12)感测的注浆管(20)温度，控制所述加热部件加热注浆管(20)所到达的温度，从而使得低温环境下注浆管(20)中聚氨酯的温度有所提升，提高了聚氨酯与水分接触的固化速度，有效解决低温环境下基坑抢险用聚氨酯固化速度慢的难题；此外，由于温度控制器(10)可以控制加热温度，有效控制加热时间节点，从而避免提前聚氨酯预加热的危险性，减少了对环境的影响。综上可见，本发明的基坑抢险注浆控温装置具有操作方便、安装维护简便、快捷、安全无污染的性能。

Description

基坑抢险注浆控温装置及其应用方法 技术领域
本发明涉及基坑防渗漏技术领域，特别涉及一种基坑抢险注浆控温装置及其应用方法。
背景技术
随着城市地下空间的发展，地下空间深度也越来越深，有的地下结构埋深已进入地下层承压水层，但作为围护结构的地下连续墙还没有很好的应对措施，在施工过程中难免出现渗漏问题，主要由于巨大的承压水压力差造成的。地下连续墙的防渗漏直接关系着整个工程质量以及施工时期基坑的稳定和安全。
常规对地连墙进行堵漏的方法主要采用快速水泥注浆等方法，但这种方法施工工期相对较长，在发生大压力、大水流等紧急事件时难以满足要求的问题。针对快速水泥注浆无法满足大压力、大水流时的堵漏的问题，由于聚氨酯堵漏剂因其膨胀率大、强度高、止水快，抗渗性好等优点，在基坑涌水涌水等应急事件中越来越广泛的被应用到。但是聚氨酯堵漏存在的问题是：不适用低温度环境下的堵漏，例如在冬季基坑抢险过程中，环境温度低于5℃，聚氨酯与水分接触后，固化速度变慢，往往被水冲稀流失，堵漏效果变差。
针对现有技术中低温环境下基坑抢险用聚氨酯固化速度慢的难题，本领域技术人员一直在寻找解决的方法。
发明内容
本发明的目的在于提供一种基坑抢险注浆控温装置及其应用方法，以解决使用现有技术中低温环境下基坑抢险用聚氨酯固化速度慢的问题。
为解决上述技术问题，本发明提供一种基坑抢险注浆控温装置，适用于低温环境下基坑抢险聚氨酯堵漏过程中，所述基坑抢险注浆控温装置包括：温度控制器、与所述温度控制器分别连接的加热部件和温度感应器，所述温度控制 器根据所述温度感应器感测的注浆管温度，控制所述加热部件加热注浆管所到达的温度。
可选的，在所述的基坑抢险注浆控温装置中，还包括套管，设置于所述注浆管的外侧，以封闭密封所述加热部件和所述温度感应器。
可选的，在所述的基坑抢险注浆控温装置中，所述注浆管的规格为
Figure PCTCN2020107258-appb-000001
管壁厚为2mm；所述套管的规格为
Figure PCTCN2020107258-appb-000002
管壁厚为1.8mm。
可选的，在所述的基坑抢险注浆控温装置中，所述加热部件为电热带，所述电热带以螺旋形缠绕并固定在注浆管外壁上。
可选的，在所述的基坑抢险注浆控温装置中，所述温度感应器设置于所述注浆管中。
可选的，在所述的基坑抢险注浆控温装置中，所述温度控制器控制所述加热部件加热注浆管所到达的温度为25℃。
可选的，在所述的基坑抢险注浆控温装置中，所述加热部件和所述温度感应器的工作温度范围为：-40℃～85℃。
可选的，在所述的基坑抢险注浆控温装置中，还包括电源，所述加热部件、所述温度感应器及所述温度控制器均与所述电源连接。
本发明还提供一种基坑抢险注浆控温装置的应用方法，所述基坑抢险注浆控温装置的应用方法包括如下步骤：
在注浆管上安装基坑抢险注浆控温装置；
利用基坑抢险注浆控温装置的温度控制器根据所述温度感应器感测的注浆管温度，控制所述加热部件加热注浆管所到达的温度。
可选的，在所述的基坑抢险注浆控温装置的应用方法中，所述加热部件为电热带时，在注浆管上安装基坑抢险注浆控温装置的过程如下：
将所述电热带以螺旋形缠绕并固定在注浆管外壁上，将温度传感器设置于注浆管中；
在所述注浆管的外侧套上套管，以封闭密封所述加热部件和所述温度感应器。
可选的，在所述的基坑抢险注浆控温装置的应用方法中，所述温度控制器控制所述加热部件加热注浆管所到达的温度为25℃。
在本发明所提供的基坑抢险注浆控温装置及其应用方法可以使低温环境下注浆管中聚氨酯的温度有所提升，提高了聚氨酯与水分接触的固化速度，有效解决低温环境下基坑抢险用聚氨酯固化速度慢的难题；此外，由于温度控制器可以控制加热温度，有效控制加热时间节点，从而避免提前聚氨酯预加热的危险性，减少了对环境的影响。综上可见，本发明的基坑抢险注浆控温装置具有操作方便、安装维护简便、快捷、安全无污染的性能。
附图说明
图1是本发明一实施例中基坑抢险注浆控温装置的结构示意图。
图中：
10-温度控制器；
11-电热带；
12-温度感应器；
13-套管；
20-注浆管。
具体实施方式
以下结合附图和具体实施例对本发明提出的基坑抢险注浆控温装置及其应用方法作进一步详细说明。根据下面说明和权利要求书，本发明的优点和特征将更清楚。需说明的是，附图均采用非常简化的形式且均使用非精准的比例，仅用以方便、明晰地辅助说明本发明实施例的目的。
请参考图1，其为本发明的基坑抢险注浆控温装置的结构示意图。如图1所示，所述基坑抢险注浆控温装置包括：温度控制器10、与所述温度控制器10分别连接的加热部件和温度感应器12，所述温度控制器10根据所述温度感应器12感测的注浆管20温度，控制所述加热部件加热注浆管20所到达的温度。本发明的基坑抢险注浆控温装置适用于低温环境下基坑抢险聚氨酯堵漏过程中，主要利用加热部件对注浆管20加热，提升注浆管20的温度，进而提高注浆管20中聚氨酯的温度，从而提高了聚氨酯与水分接触的固化速度，有效解决低温环境下基坑抢险用聚氨酯固化速度慢的难题。此外，利用温度控制器10控制加 热温度，有效控制加热时间节点，从而避免提前聚氨酯预加热的危险性(因为聚氨酯的运输、储存是密封塑料桶包装，加热很容易发生爆炸)，降低了聚氨酯发生爆炸对环境的污染情况发生，安全可靠。
较佳的，本实施例中，如图1所示，所述加热部件为电热带11，所述电热带11以螺旋形缠绕并固定在注浆管20外壁上；所述温度感应器12包括但不局限于设置于所述注浆管20中，只要感测注浆管20的温度即可。具体的，电热带11以螺旋形方式缠绕在注浆管20外壁，缠绕的螺距根据《管道电伴热带缠绕安装表图》图集03S401确定，所述电热带11缠绕后占据所述注浆管20的长度小于100m。电热带11具有的优点为：加热温度均匀，不会过热，安全可靠；节约电能，运行费用低；间歇操作，升温启动快，因此，采用电热带11作为基坑抢险注浆控温装置的加热部件最为安全可靠。
进一步地，所述加热部件和所述温度感应器的工作温度范围为：-40℃～85℃；所述温度控制器控制所述加热部件加热注浆管所到达的温度为25℃，因为聚氨酯遇水后发生扩链交联反应，实验证明最佳的环境温度是25℃时，固化只有十几秒。
请继续参考图1，所述基坑抢险注浆控温装置还包括套管13，设置于所述注浆管20的外侧，以封闭密封所述加热部件和所述温度感应器12，其目的是防止水、泥浆等进入套管13内，引起加热部件和温度感应器12短路或失灵。可以理解的，这里封闭密封所述加热部件和所述温度感应器12并非完全密封，经封闭密封后的套管13两端会露出加热部件和温度感应器12的接头，以便与设置于套管13外部的温度控制器10连接。
本实施例中，所述注浆管的规格为
Figure PCTCN2020107258-appb-000003
管壁厚为2mm，能抵抗最高压力为0.3Mpa；所述套管的规格为
Figure PCTCN2020107258-appb-000004
管壁厚为1.8mm，内涂保温涂料。
进一步地，所述基坑抢险注浆控温装置还包括电源，所述加热部件、所述温度感应器及所述温度控制器均与所述电源连接，电源采用220V，用于给温度感应器和温度控制器提供能量。
相应的，本实施例还提供了一种基坑抢险注浆控温装置的应用方法。下面参考图1，以加热部件为电热带11为例，详细说明本实施例所述基坑抢险注浆控温装置的应用方法，所述基坑抢险注浆控温装置的应用方法具体包括如下步 骤：
首先，执行步骤S1，在注浆管20上安装基坑抢险注浆控温装置；
具体的，首先，在注浆管20外壁上以螺旋形方式缠绕固定电热带11，并安装一个温度感应器12，以实时监测注浆管20温度；接着，在电热带和温度感应器12安装完成后，外面再套上
Figure PCTCN2020107258-appb-000005
的管子，两端露出电热带接头封闭套管，从而有效防止水、泥浆等进入套管内，引起电热带和温度感应器12短路或失灵；最后，将电热带11、温度感应器12、温度控制器接到电源上，将电热带和温度感应器12的接头分别接到温度控制器10上。
接着，执行步骤S2，利用基坑抢险注浆控温装置的温度控制器10根据所述温度感应器12感测的注浆管20温度，控制所述加热部件加热注浆管20所到达的温度；优选的，所述温度控制器控制所述加热部件加热注浆管20所到达的温度为25℃。
综上，在本发明所提供的基坑抢险注浆控温装置及其应用方法中，所述基坑抢险注浆控温装置包括温度控制器、与所述温度控制器分别连接的加热部件和温度感应器，所述温度控制器根据所述温度感应器感测的注浆管温度，控制所述加热部件加热注浆管所到达的温度，从而使得低温环境下注浆管中聚氨酯的温度有所提升，提高了聚氨酯与水分接触的固化速度，有效解决低温环境下基坑抢险用聚氨酯固化速度慢的难题；此外，由于温度控制器可以控制加热温度，有效控制加热时间节点，从而避免提前聚氨酯预加热的危险性，减少了对环境的影响。综上可见，本发明的基坑抢险注浆控温装置具有操作方便、安装维护简便、快捷、安全无污染的性能。
上述描述仅是对本发明较佳实施例的描述，并非对本发明范围的任何限定，本发明领域的普通技术人员根据上述揭示内容做的任何变更、修饰，均属于权利要求书的保护范围。

Claims (11)

  1. 一种基坑抢险注浆控温装置，适用于低温环境下基坑抢险聚氨酯堵漏过程中，其特征在于，包括：温度控制器、与所述温度控制器分别连接的加热部件和温度感应器，所述温度控制器根据所述温度感应器感测的注浆管温度，控制所述加热部件加热注浆管所到达的温度。
  2. 如权利要求1所述的基坑抢险注浆控温装置，其特征在于，还包括套管，设置于所述注浆管的外侧，以封闭密封所述加热部件和所述温度感应器。
  3. 如权利要求2所述的基坑抢险注浆控温装置，其特征在于，所述注浆管的规格为
    Figure PCTCN2020107258-appb-100001
    管壁厚为2mm；所述套管的规格为
    Figure PCTCN2020107258-appb-100002
    管壁厚为1.8mm。
  4. 如权利要求1所述的基坑抢险注浆控温装置，其特征在于，所述加热部件为电热带，所述电热带以螺旋形缠绕并固定在注浆管外壁上。
  5. 如权利要求4所述的基坑抢险注浆控温装置，其特征在于，所述温度感应器设置于所述注浆管中。
  6. 如权利要求1所述的基坑抢险注浆控温装置，其特征在于，所述温度控制器控制所述加热部件加热注浆管所到达的温度为25℃。
  7. 如权利要求1所述的基坑抢险注浆控温装置，其特征在于，所述加热部件和所述温度感应器的工作温度范围为：-40℃～85℃。
  8. 如权利要求1～7中任一项所述的基坑抢险注浆控温装置，其特征在于，还包括电源，所述加热部件、所述温度感应器及所述温度控制器均与所述电源连接。
  9. 一种基坑抢险注浆控温装置的应用方法，其特征在于，包括如下步骤：
    在注浆管上安装基坑抢险注浆控温装置；
    利用基坑抢险注浆控温装置的温度控制器根据所述温度感应器感测的注浆管温度，控制所述加热部件加热注浆管所到达的温度。
  10. 如权利要求9所述的基坑抢险注浆控温装置的应用方法，其特征在于，所述加热部件为电热带时，在注浆管上安装基坑抢险注浆控温装置的过程如下：
    将所述电热带以螺旋形缠绕并固定在注浆管外壁上，将温度传感器设置于注浆管中；
    在所述注浆管的外侧套上套管，以封闭密封所述加热部件和所述温度感应 器。
  11. 如权利要求9所述的基坑抢险注浆控温装置的应用方法，其特征在于，所述温度控制器控制所述加热部件加热注浆管所到达的温度为25℃。
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