KR100394433B1 - Method of horizontal drainage for pore water pumping of soft ground improvement - Google Patents
Method of horizontal drainage for pore water pumping of soft ground improvement Download PDFInfo
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- KR100394433B1 KR100394433B1 KR10-2000-0034778A KR20000034778A KR100394433B1 KR 100394433 B1 KR100394433 B1 KR 100394433B1 KR 20000034778 A KR20000034778 A KR 20000034778A KR 100394433 B1 KR100394433 B1 KR 100394433B1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
본 발명은 연약지반 개량구역의 압밀침하에 따라 발생하는 과잉 간극수의 원활한 배수에 의한 압밀침하 촉진, 집수정과 수평 배수관로의 용이한 설치, 공사비 절감 및 연약지반 개량공사의 시공성과 효율성 향상을 위한 배수공법으로서, 연약지반 개량구역의 연약지반을 터파기하여 수직 유공관을 설치하고 일정한 높이로 부순돌을 채운 다음 그 위에 수직 연장관을 잇대어서 집수정을 구축하고, 상기 수직 유공관 주위에 수평 유공관을 연결하여 수평 배수관로를 구축한 후, 매립층과 선행재하 성토층으로 안정시켜 연약지반의 압밀침하과정에서 발생하는 과잉 간극수용 집수역할을 담당하게 하고, 자연 집수되는 과잉 간극수를 강제로 배수 처리할 수 있도록 시공하는 것이다.The present invention is to promote consolidation settlement by smooth drainage of excess pore water generated by consolidation settlement of soft ground improvement zone, easy installation of water collecting well and horizontal drainage pipe, reduction of construction cost and improvement of construction and efficiency of soft ground improvement construction. As a drainage method, break up the soft ground of the soft ground improvement zone, install vertical perforated pipes, fill the crushed stone to a certain height, build a catchment well by connecting vertical extension pipes on it, and connect horizontal perforated pipes around the vertical perforated pipes. After constructing the horizontal drainage channel, stabilize the landfill layer and the preloaded sedimentary layer to play the role of collecting water for the excess pore water generated during the consolidation settlement of the soft ground, and construct it to forcibly drain the excess water collected naturally. It is.
Description
본 발명은 연약지반내에 투수성이 양호한 0.5∼10㎝ 정도의 자갈크기로 작게The present invention is small in the gravel size of about 0.5 ~ 10㎝ good water permeability in soft ground
깬 부순돌과 원심력 철근콘크리트 유공관, 원심력 철근 콘크리트관, 폴리에틸렌 유공관을 사용하여 집수정과 수평 배수관로를 설치하고 성토하중을 재하하여 연약지반을 압밀침하시키는 과정에서 발생하는 과잉 간극수를 수평으로 배수시키는 방법에 관한 것이며, 특히 과잉 간극수 처리를 위한 집수정과 수평 배수관로의 구축을 현장여건에 맞게 다양한 크기로 쉽게 설치할 수 있고, 그 과정에서 발생되는 과잉 간극수를 지중에서 정체됨이 없이 가장 가까운 수평 배수관로와 집수정으로 자연 집수되도록 유도하여 강제로 배수시키는 연약지반 개량구역의 간극수처리용 수평 배수공법에 관한 것이다.Using a broken crushed stone and centrifugal reinforced concrete pipes, centrifugal reinforced concrete pipes, and polyethylene hollow pipes to horizontally drain excess pore water generated in the process of consolidating the soft ground by loading sedimentation wells and horizontal drainage channels. In particular, the construction of a water collecting well and a horizontal drainage pipe for the treatment of excess pore water can be easily installed in various sizes according to the site conditions, and the excess horizontal water pipes generated in the process can be installed without having to stall in the ground. It relates to a horizontal drainage method for pore water treatment in soft ground improvement zones that induces natural drainage by furnace and catchment well.
일반적으로 연약지반개량공사에 적용되고 있는 수평 배수공법의 목적은 연약지반의 압밀침하를 위한 상부 배수층의 역할과 성토층 속으로 지하수가 상승하는 것을 차단하고 시공기계의 주행성(Trafficability)을 확보하는 지지층의 역할을 위한 것이다.The purpose of the horizontal drainage method, which is generally applied to soft ground improvement works, is to act as an upper drainage layer for consolidation settlement of the soft ground, and to support the groundwater to prevent the rise of groundwater into the fill layer and to secure the trafficability of the construction machine. It is for the role of.
이러한 목적을 달성하기 위하여 지반조건에 따라 모래 등을 사용하여 균일한 두께로 연약지반 위에 수평 배수층(Sand Mat)을 포설하며, 수평 배수층의 배수기능을 향상시키고자 폴리에틸렌 유공관을 수평으로 부설하여 압밀침하로 발생하는 과잉 간극수를 배제시키는 방법이 주로 사용되고 있다.In order to achieve this purpose, sand mats are laid on the soft ground with a uniform thickness using sand, etc., and the polyethylene pipes are laid horizontally to improve the drainage function of the horizontal drainage layers. The method of eliminating the excess pore water generated by is mainly used.
그러나 이러한 일반적인 수평 배수층은 연약지반의 압밀침하가 균일하게 발생되어야 배수기능이 안정적으로 유지되는데, 연약지반개량구역내 압밀침하의 국부적인 편차가 심한 탓으로 발생하는 과잉 간극수의 원활한 배수가 곤란하고, 폴리에틸렌 유공관의 손괴 등 수평 배수기능의 저하로 과잉 간극수의 소산이 늦어져서 압밀지연을 초래하기도 하며, 수평 배수층 형성용 모래 등의 자재비가 과다하게 소요되는 문제점이 있다.However, this general horizontal drainage layer maintains stable drainage function when the consolidation settlement of the soft ground is uniformly generated, and it is difficult to smoothly drain the excess pore water caused by the local deviation of the consolidation settlement in the soft ground improvement zone. Degradation of the horizontal drainage function, such as the collapse of the polyethylene perforated pipe, delays the dissipation of excess pore water, resulting in consolidation delay, and there is a problem that excessive material costs such as sand for horizontal drainage layer formation are required.
본 발명의 목적은 상기한 바와 같은 문제점을 고려하여 과잉 간극수 처리를 위해 집수정과 수평 배수관로를 다양한 크기로서 용이하게 구축할 수 있고, 상기 집수정과 수평 배수관로를 연약지반내에 설치하여 과잉 간극수의 자연 집수 및 강제로 배수시키기 용이한 수평 배수방법을 제공하려는 것이다.It is an object of the present invention to easily construct a sump well and a horizontal drainage pipe in various sizes for the treatment of excess pore water in consideration of the problems described above, and to install the sump well and the horizontal drainage pipe in a soft ground. It is intended to provide a horizontal drainage method that facilitates natural collection and forced drainage.
본 발명은 연약지반 개량구역의 연약지반을 터파기하여 수직 유공관을 설치하고 일정한 높이로 부순돌을 채운 다음 그 위에 수직 연장관을 잇대어서 집수정을 구축하고, 상기 수직 유공관 주위에 수평 유공관을 설치하여 수평 배수관로를 구축한 후, 매립층과 선행재하 성토층으로 안정시켜 연약지반의 압밀침하과정에서 발생하는 과잉 간극수의 집수역할을 담당하게 하고, 자연 집수되는 과잉 간극수를 강제로 배수 처리할 수 있도록 시공하는 것을 기술구성상의 특징으로 하는 연약지반 개량구역의 간극수처리용 수평 배수공법을 제공한다.The present invention breaks down the soft ground of the soft ground improvement zone, installs a vertical perforated pipe, fills the cobblestone to a certain height, and builds a water collecting well by connecting a vertical extension pipe thereon, and installs a horizontal perforated pipe around the vertical perforated pipe. After constructing the drainage pipe, it is stabilized as the landfill layer and the prefilled sedimentary layer to play the role of collecting the excess pore water generated during the consolidation settlement of the soft ground, and constructs to forcibly drain the excess pore water collected naturally. It provides a horizontal drainage method for treating the pore water in the soft ground improvement zone, which is characterized by its technical configuration.
도 1은 간극수처리 수평 배수공법에 의한 배수구조의 종단면도1 is a longitudinal sectional view of a drainage structure by a pore water treatment horizontal drainage method;
도 2는 간극수처리 수평 배수관로의 종단면도Figure 2 is a longitudinal sectional view of the pore water treatment horizontal drain pipe
도 3은 간극수처리 수평 배수공법에 의한 배수관로의 개괄적 평면도3 is a schematic plan view of the drainage pipe by the pore water treatment horizontal drainage method;
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
1 : 연약지반 2 : 매립층1: soft ground 2: landfill layer
3 : 선행재하 성토층 4 : 수직 유공관3: prefilled fill layer 4: vertical perforated pipe
5 : 수직 연장관 6 : 뚜껑5: vertical extension tube 6: lid
7a,b,c,d,e : 부순돌 8a,b : 사질토7a, b, c, d, e: Crushed stone 8a, b: sandy soil
9 : 수평 유공관 10 : 과잉 간극수9: horizontal perforated pipe 10: excess pore water
11 : (집수정 설치용)터파기 12 : (수평 배수관로구축용) 터파기11: Excavator (for collecting water collector) 12: Excavator (for building horizontal drainage pipe)
13 : 집수정 14 : 수평 배수관로13: sump 14: horizontal drain pipe
15 : 연약지반 개량구역15: Soft ground improvement zone
본 발명의 간극수처리 수평 배수공법은 부순돌을 이용하여 설치한 집수정과 수평 배수관로로 구성된다. 집수정은 하위의 원심력 철근 콘크리트제 수직 유공관과 상위의 원심력 철근 콘크리트제 수직 연장관으로 이뤄지고, 수평 배수관로는 합성수지제 수평 유공관으로서 연약지반내에 구축한다.The horizontal drainage method of the pore water treatment of the present invention is composed of a sump and horizontal drainage pipes installed using a crushed stone. The sump is composed of the lower centrifugal reinforced vertical vertical perforated pipe and the upper centrifugal reinforced vertical vertical pipe. The horizontal drainage pipe is constructed in the soft ground as a horizontal horizontal hollow pipe made of synthetic resin.
시공장비의 진입과 주행성을 확보할 수 있는 정도의 연약지반 또는 하천가,해안가 등의 매립층 하부에 두께 10m 이내의 연약지반이 존재하는 지층의 경우에도 이 공법은 적용가능하다. 초연약지반의 경우에는 시공장비의 진입과 주행성을 확보할 수 있는 정도의 성토용 토사를 포설한 후에 적용한다.This method is also applicable to the soft ground or the ground where the soft ground of less than 10m thickness exists in the bottom of the buried layer such as riversides and shores to ensure the entry and running of construction equipment. In the case of ultra soft ground, it is applied after laying the soil for the level that can secure the entry and runability of construction equipment.
압밀침하의 국부적인 편차로 인해 소산되기 어려운 과잉 간극수를 연약지반개량구역내에 설치한 다수의 집수정과 이를 연결하는 수평 배수관로에 정체되지 않도록 자연적으로 집수되게 하고 별도의 양수장비로서 강제적으로 배수 처리할 수 있게 하여, 연약지반 개량기간 내내 안정적인 수평 배수기능을 유지되도록 하는 것이 본 발명의 궁극적인 목표요, 핵심이다.Excessive pore water, which is difficult to dissipate due to local deviation of consolidation settlement, is naturally collected to prevent stagnation in a number of collection wells installed in the soft ground improvement zone and horizontal drainage pipes connecting them, and is forcibly drained as a separate pumping equipment. It is the ultimate goal and core of the present invention to be able to maintain a stable horizontal drainage function throughout the soft ground improvement period.
이하 첨부도면을 참조하여 구체적으로 본 발명의 시공방법을 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail the construction method of the present invention.
연약지반개량공사는 선행 재하공법을 적용한다. 수직 드레인재를 이용한 연직 배수공법을 적용할 경우에는 집수정(13)과 수평 배수관로(14)를 설치하기 전에 미리 수직 드레인재를 타설한다.Soft ground improvement works apply the preceding rehabilitation method. When the vertical drainage method using the vertical drainage material is applied, the vertical drainage material is poured in advance before the collection well 13 and the horizontal drainage pipe 14 are installed.
도 1은 간극수처리에 따른 수평 배수용 시공단면도로서, 연약지반 개량구역(15)내의 연약지반(1)에 집수정(13)을 설치하기 위하여 우선 연약지반(1)에 터파기(11)를 실시하고 원심력 철근 콘크리트제 수직 유공관(4)을 설치하며, 터파기(11)된 연약지반(1)의 바닥에서 상기 수직 유공관(4)의 하단 내부에 부순돌(7a)을 0.3m-0.6m 높이로 채운다. 이와 같이 수직 유공관(4)의 하단 내부에 채워지는 부순돌(7a)은, 그 수직 유공관의 하단 내부로 연약지반(1)이 부풀어 오르는 히빙(Heaving)현상을 방지하여 주는 동시에, 침하 등의 지반변형으로부터 수직 유공관의 안정성을 유지하는 데 도움이 된다.1 is a construction cross-sectional view for horizontal drainage according to pore water treatment, in order to install a collecting well 13 on the soft ground 1 in the soft ground improvement zone 15, first, the trench 11 is installed on the soft ground 1. The vertical perforated pipe made of reinforced concrete centrifugal force (4) and 0.3m-0.6m in the bottom of the vertical perforated pipe (4) in the bottom of the soft ground (1) of the trench 11 Fill it with height. As described above, the crushed stone 7a filled in the lower end of the vertical perforated pipe 4 prevents the heaving phenomenon in which the soft ground 1 swells into the lower end of the vertical perforated pipe 4, and also provides ground for settlement It helps to maintain the stability of the vertical perforated tube from deformation.
상기 수직 유공관(4)에서 수평 배수용 폴리에틸렌 등의 합성수지제 수평 유공관(9)이 설치될 곳까지 터파기(11)된 연약지반(1)은 부순돌(7b)로 되메우고, 수직 유공관(4)에 수평 유공관(9)을 연결한 후 연약지반(1)의 윗경계선까지 부순돌(7c)을 포설한다.The soft ground (1), which is broken through to the place where the horizontal hollow pipe (9) made of synthetic resin, such as polyethylene for horizontal drainage, is installed in the vertical hollow pipe (4), is filled with a crushed stone (7b), and the vertical hollow pipe (4). After connecting the horizontal perforated pipe (9) to the crushed stone (7c) to the upper boundary line of the soft ground (1).
그 후, 수직 유공관(4)의 상단에는 선행재하 성토층(3)보다도 30㎝ 높게 원심력 철근 콘크리트제 수직 연장관(5)을 연결하고, 이 수직 연장관(5)의 주위 공간은 사질토(8a)로 1차 매립하여 매립층(2)을 이루고, 그 위 설계높이까지는 성토하여 선행재하 성토층(3)을 조성한다. 시공 후 수직 연장관(5)의 상단에는 내구성이 양호한 뚜껑(6)을 덮어서, 시공이 완료된 집수정(13) 내에 이물질의 유입을 차단하고, 작업자나 통행자가 실족하여서 집수정(13) 내에 추락하는 안전사고의 발생을 미연에 방지할 수 있도록 한다.Thereafter, a vertical extension pipe 5 made of centrifugal force reinforced concrete is connected to the upper end of the vertical perforated pipe 4 by 30 cm higher than the preloaded soil layer 3, and the surrounding space of the vertical extension pipe 5 is made of sandy soil 8a. The landfill layer 2 is formed by the first filling, and the filling layer is filled up to the design height thereon to form the preceding loading fill layer 3. After construction, the top of the vertical extension pipe (5) is covered with a durable lid (6) to block the inflow of foreign matter in the sump (13) completed construction, and fall down in the sump (13) due to the operator or a passer Prevent accidents in advance.
여기서, 시공 후 수직 유공관(4)은 수직 연장관(5)과 함께 집수정(13)의 역할을 하고, 수평 유공관(9)은 수평 배수관로(14)를 이룬다.Here, after construction, the vertical perforated pipe 4 serves as a collecting well 13 together with the vertical extension pipe 5, and the horizontal perforated pipe 9 forms a horizontal drainage pipe 14.
도 2는 과잉 간극수를 처리하기 위한 수평 배수관로(14)의 종단면도로서, 연약지반(1)을 1.0m 가량 터파기(12)한 후 바닥으로부터 20㎝ 높이로 부순돌(7d)을 포설하고 그 위에 수평 유공관(9)을 설치한 다음 그 위에 다시 40㎝ 두께로 부순돌(7e)을 되메우며, 연약지반(1)의 윗경계선까지의 나머지 높이 40㎝는 사질토(8b)로 되메워 수평 배수관로(14)를 구축한다.FIG. 2 is a longitudinal cross-sectional view of a horizontal drain pipe 14 for treating excess pore water. After digging 12 of the soft ground 1 for about 1.0 m, the crushed stone 7d is laid at a height of 20 cm from the bottom. The horizontal perforated pipe 9 is installed thereon, and then 40 cm thick backfilled stone 7e is placed thereon, and the remaining height 40 cm to the upper boundary line of the soft ground 1 is filled with sandy soil 8b horizontally. A drain pipe 14 is constructed.
도 3은 연약지반 개량구간(15)내에 집수정(13)과 수평 배수관로(14)의 시공 모식도이다.3 is a schematic view illustrating the construction of the sump well 13 and the horizontal drainage pipe 14 in the soft ground improvement section 15.
이상 설명한 바와 같은 본 발명은 연약지반의 압밀침하로 발생된 과잉 간극The present invention as described above, the excess gap caused by the consolidation settlement of the soft ground
수를 부순돌을 이용하여 집수정과 수평 배수관로를 구축하는 것으로서, 연약지반개량구역내에 간극수처리용 수평 배수관로의 안정적 유지와 기능향상을 도모함으로서 압밀침하를 촉진시킬 수 있고, 상기 집수정과 수평 배수관로를 용이하게 설치할 수 있으며, 공사비가 저렴하고, 연약지반개량공사의 시공성과 효율성을 높일 수 있다.It is possible to promote the consolidation settlement by promoting the stable maintenance and improvement of the function of the horizontal drainage pipe for the pore water treatment in the soft ground improvement area by constructing the sump and the horizontal drainage pipe using the crushed water. The horizontal drainage pipe can be easily installed, the construction cost is low, and the construction and efficiency of the soft ground improvement work can be improved.
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| KR100641032B1 (en) * | 2006-05-24 | 2006-11-02 | 주식회사 용마엔지니어링 | Method and structure for draining underground water of poor subsoil |
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| CN101994312B (en) * | 2010-10-15 | 2012-02-01 | 中冶沈勘工程技术有限公司 | Soil side slope or tailings dam drainage construction method |
| CN105201002B (en) * | 2015-10-23 | 2017-08-25 | 金磐集团有限公司 | A kind of underground structure oozes drainage system and its construction method |
| CN110228860A (en) * | 2019-07-15 | 2019-09-13 | 大连地拓环境科技有限公司 | One kind being used for Abandoned Land of Mine pollution prevention system |
| CN111962492A (en) * | 2020-08-28 | 2020-11-20 | 东华理工大学 | Soft soil foundation treatment device and method |
| CN114855846A (en) * | 2022-06-08 | 2022-08-05 | 贵州建工兴印建筑工程有限公司 | Underground seepage-proofing pressure-reducing anti-floating blind pipe structure and construction method thereof |
| CN115262309A (en) * | 2022-09-01 | 2022-11-01 | 核工业华东建设工程集团有限公司 | Construction method for settlement-preventing highway subgrade in soft soil area |
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