WO2020211285A1 - Inspection and construction method for composite cement-soil pile - Google Patents

Inspection and construction method for composite cement-soil pile Download PDF

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Publication number
WO2020211285A1
WO2020211285A1 PCT/CN2019/106655 CN2019106655W WO2020211285A1 WO 2020211285 A1 WO2020211285 A1 WO 2020211285A1 CN 2019106655 W CN2019106655 W CN 2019106655W WO 2020211285 A1 WO2020211285 A1 WO 2020211285A1
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Prior art keywords
pile
soil
cement
outer tube
construction method
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PCT/CN2019/106655
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French (fr)
Chinese (zh)
Inventor
朱建新
谢京臣
丁建华
冯新林
陆广
包华
洪俊青
姚锋祥
张宏其
江华
朱峰
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朱建新
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Publication of WO2020211285A1 publication Critical patent/WO2020211285A1/en
Priority to ZA2020/07122A priority Critical patent/ZA202007122B/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00—Testing foundations or foundation structures
    • 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
    • E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds

Definitions

  • the invention relates to a detection construction method of a composite cement-soil pile.
  • the purpose of the present invention is to provide a method for detecting and constructing composite cement-soil piles that can not only improve the quality of cement-soil, but also simultaneously detect the quality of cement-soil.
  • a detection and construction method for composite cement-soil piles includes the construction of peripheral piles and core piles.
  • the peripheral piles are the first pile and the core pile is the second pile, and are characterized by the following steps:
  • Placement Place the outer pipe at the center of the first cement-soil pile constructed
  • the construction method of the first pile includes one of the following methods:
  • Rotary pull up Rotate the drill pipe up to the set height, and perform one or more treatments of air jet, water jet, ash jet and grout according to the soil conditions;
  • the site and foundation have been pre-treated according to the set requirements.
  • the static probe is a standard probe or high-strength probe purely used for testing.
  • the dynamic cone penetration in Method B of the second pile construction method is a standard free fall dynamic hammer composed of a penetration probe, a penetration rod, and a penetrating hammer, or a similar improved three-in-one high-strength free-fall dynamic hammer.
  • the filler of the present invention may be granular materials such as soil and sand, or cementitious materials such as soil cement and cement mixture.
  • Step (2) the outer tube protection tube is not pulled up, and it is used as a reinforced stiffener in the cement-soil body for composite foundation; the outer tube protection tube is equipped with a hot melt sleeve, isolation film, and lubricant. In the foundation pit support.
  • Step (2) In method A and method B, pre-embedded in the hollow cavity of the hollow cement-soil body with stress and strain gauges, reinforcing steel strain gauges, sensing optical fibers, pile sinking pipes or pile tip sinking pipes, for scientific research tests and real-time monitoring.
  • the first pile is in the form of a ring-shaped segmented cement-soil pile.
  • a ring-shaped steel sleeve is set at the upper end of the first pile to be pressed down until the first and second piles cemented together are separated and destroyed for inspection The friction force between the cement-soil body of the first pile and the cast-in-situ pile of the second pile.
  • Step (2) In method B, the free-falling hammer is left in the cement and soil for foundation pit support.
  • the hollow cement-soil pile formed by the present invention is suitable for composite foundation and foundation pit support; the composite cement-soil pile is formed, which is suitable for high-strength composite foundation, and is also suitable for rigid composite piles and root-fixed piles;
  • the quality and strength of a pile of cement-soil can also be simultaneously integrated to detect the quality of the first pile of cement-soil; it is also suitable for the preliminary investigation stage of engineering investigation, which serves multiple purposes.
  • a detection and construction method for composite cement-soil piles includes the construction of peripheral piles and core piles.
  • the peripheral piles are the first pile and the core pile is the second pile, including the following steps:
  • Placement Place the outer pipe at the center of the first cement-soil pile constructed
  • the construction method of the first pile includes one of the following methods:
  • Rotary pull up Rotate the drill pipe up to the set height, and perform one or more treatments of air jet, water jet, ash jet and grout according to the soil conditions;
  • the site and foundation have been pre-treated according to the set requirements.
  • the static probe is a standard probe or a high-strength non-standard probe purely used for testing.
  • the dynamic cone penetration in Method B of the second pile construction method is a standard free fall dynamic hammer consisting of a penetration probe, a penetration rod, and a penetrating hammer, or a similarly improved three-in-one non-standard high-strength free-fall dynamic hammer.
  • the filler of the present invention may be granular materials such as soil and sand, or cementitious materials such as soil cement and cement mixture.
  • Step (2) the outer tube protection tube is not pulled up, and it is used as a reinforced stiffener in the cement-soil body for composite foundation; the outer tube protection tube is equipped with a hot melt sleeve, isolation film, and lubricant. In the foundation pit support.
  • Step (2) In method A and method B, pre-embedded in the hollow cavity of the hollow cement-soil body with stress and strain gauges, reinforcing steel strain gauges, sensing optical fibers, pile sinking pipes or pile tip sinking pipes, for scientific research tests and real-time monitoring.
  • the first pile is in the form of a ring-shaped segmented cement-soil pile.
  • a ring-shaped steel sleeve is set at the upper end of the first pile to be pressed down until the first and second piles cemented together are separated and destroyed for inspection The friction force between the cement-soil body of the first pile and the cast-in-situ pile of the second pile.
  • Step (2) In method B, the free-falling hammer is left in the cement and soil for foundation pit support.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

An inspection and construction method for a composite cement-soil pile, comprising constriction of a peripheral pile and a core pile. The peripheral pile is a first pile, and the core pole is a second pole. The construction method comprises the following steps: (1) constructing the first pile; and (2) constructing the second pile in the center of the constructed first pile, and inspecting the first pile while forming the second pile.

Description

复合水泥土桩的检测施工方法Detection and construction method of composite cement-soil pile 技术领域Technical field
本发明涉及一种复合水泥土桩的检测施工方法。The invention relates to a detection construction method of a composite cement-soil pile.
背景技术Background technique
现有的水泥土桩，水泥（砂浆）土桩，无论是地下原位搅拌水泥土桩，还是地上预拌回灌地下水泥土桩，其施工检测方法存在一些不足之处，需进一步改进。The existing cement-soil piles, cement (mortar)-soil piles, whether they are underground in-situ mixing cement-soil piles or ground premixed and refilled underground cement-soil piles, have some shortcomings in their construction detection methods and need to be further improved.
技术问题technical problem
本发明的目的在于提供一种既能提高水泥土质量，也能同步检测水泥土质量的复合水泥土桩的检测施工方法。The purpose of the present invention is to provide a method for detecting and constructing composite cement-soil piles that can not only improve the quality of cement-soil, but also simultaneously detect the quality of cement-soil.
技术解决方案Technical solutions
一种复合水泥土桩的检测施工方法，包括外围桩、芯桩的施工，外围桩即第一桩、芯桩即第二桩，其特征是：包括下列步骤：A detection and construction method for composite cement-soil piles includes the construction of peripheral piles and core piles. The peripheral piles are the first pile and the core pile is the second pile, and are characterized by the following steps:
（一）施工第一桩；(1) Construction of the first pile;
（二）施工第二桩：施工检测第一桩，并形成第二桩；(2) Construction of the second pile: construction inspection of the first pile and formation of the second pile;
包括下列方法之一Include one of the following methods
方法A：Method A:
（1）就位：将钻杆就位于已施工好的第一桩水泥土桩中心；(1) Position: Place the drill pipe at the center of the first cement-soil pile that has been constructed;
（2）下沉：将装有静力触探头的钻杆压入试验水泥土中，通过量测系统测水泥土的贯入阻力，确定水泥土的物理力学特性，直接检测水泥土的质量；如钻杆压入、静力触探有困难，则在钻杆外选配尺寸匹配的外管护筒，通过交互钻杆钻进、外管护筒跟进的方式，钻杆压入外管护筒，外管护筒依靠外力下沉至设定深度；间接检测水泥土的质量；同时外管护筒二次挤扩第一桩水泥土桩，提高水泥土桩的质量强度；(2) Sinking: Press the drill pipe with static probe into the test cement soil, measure the penetration resistance of the cement soil through the measurement system, determine the physical and mechanical properties of the cement soil, and directly detect the quality of the cement soil; If it is difficult to press-in the drill pipe and static penetration, an outer tube protection tube of matching size is selected outside the drill rod, and the drill rod is pressed into the outer tube through interactive drill rod drilling and follow-up of the outer tube protection tube The protective tube, the outer tube protective tube sinks to the set depth by external force; indirectly detects the quality of the cement-soil; at the same time, the outer tube protective tube secondarily expands the first cement-soil pile to improve the quality and strength of the cement-soil pile;
（3）上拔：将钻杆、外管护筒上拔至设定高度，形成空心水泥土桩第二桩，空心腔内回填填充料，形成桩身复合水泥土桩；空心腔底部封底、隔底或扩底，形成桩底复合水泥土桩；(3) Pull up: Pull up the drill pipe and the outer tube protection tube to the set height to form the second hollow cement-soil pile. The hollow cavity is backfilled with filler to form the pile body composite cement-soil pile; the bottom of the hollow cavity is sealed, Separate or expand the bottom to form a composite cement-soil pile at the bottom of the pile;
方法B：Method B:
（1）就位：将外管就位于施工好的第一桩水泥土桩中心；(1) Placement: Place the outer pipe at the center of the first cement-soil pile constructed;
（2）下沉：将装有动力触探触头、触探杆的穿心锤自由落体下沉至水泥土中，通过量测系统测标贯锤击数，确定水泥土的物理力学特性，直接检测水泥土的质量；如触探触头下沉、动力触探有困难，则在穿心锤外选配尺寸匹配的外管护筒，通过交互穿心锤自由落体下沉与外管外力下沉至设定深度，间接检测水泥土的质量；同时穿心锤外管护筒二次挤扩第一桩水泥土桩，提高水泥土桩的质量强度；(2) Subsidence: The penetrating hammer equipped with the dynamic penetration probe and the penetration rod is sunk into the cement soil freely, and the number of standard penetration hammers is measured by the measurement system to determine the physical and mechanical properties of the cement soil. Directly detect the quality of cement and soil; if the penetrating probe sinks and dynamic penetrating is difficult, the outer tube protection tube of matching size is selected outside the penetrating hammer, and the free fall sinking of the penetrating hammer is exchanged with the external force of the outer tube Sink to the set depth to indirectly detect the quality of cement-soil; at the same time, the outer pipe-protecting tube of the piercing hammer secondarily expands the first cement-soil pile to improve the quality and strength of the cement-soil pile;
（3）上拔：将穿心锤、外管护筒上拔至设定高度，形成空心水泥土桩第二桩；空心腔内回填填充料，形成桩身复合水泥土桩；空心腔底部封底、隔底或扩底，形成桩底复合水泥土桩。(3) Pull up: Pull the punching hammer and the outer tube protection tube up to the set height to form the second pile of hollow cement-soil pile; the hollow cavity is backfilled with filler to form the pile body composite cement-soil pile; the bottom of the hollow cavity is sealed , Separate or expand the bottom to form a composite cement-soil pile at the bottom of the pile.
所述第一桩的施工方法包括下列方法之一：The construction method of the first pile includes one of the following methods:
方法A：Method A:
（1）移机就位：移动设备，将钻杆就位于设定桩位上；(1) Move the machine into position: move the equipment and place the drill rod on the set pile position;
（2）旋压下沉：将钻杆旋压下沉至设定深度，根据土体情况，进行喷气、喷水、喷灰、喷浆中的一种或几种处理；(2) Spinning sinking: Spin down the drill pipe to a set depth, and perform one or more treatments of air jet, water spray, ash spray and grout according to the soil condition;
（3）旋拉上提：将钻杆旋拉上提至设定高度，根据土体情况，进行喷气、喷水、喷灰、喷浆中的一种或几种处理；(3) Rotary pull up: Rotate the drill pipe up to the set height, and perform one or more treatments of air jet, water jet, ash jet and grout according to the soil conditions;
（4）重复（2）和（3），至第一桩满足设定要求；(4) Repeat (2) and (3) until the first pile meets the set requirements;
方法B：Method B:
（1）移机就位：移动设备，将外管就位于设定桩位上；(1) Move the machine into place: move the equipment and place the outer tube on the set pile position;
（2）沉管：将外管沉管下沉至设定深度，将预拌水泥土回灌外管内；(2) Immersed pipe: sink the immersed pipe of the outer pipe to the set depth, and pour the ready-mixed cement soil back into the outer pipe;
（3）拔管：将外管上拔至设定高度，至回灌水泥土桩满足设定要求。(3) Extubation: Pull the outer tube up to the set height until the cement-soil pile is filled to meet the set requirements.
施工第一桩时，根据设定要求，场地与地基已经做好预处理。When constructing the first pile, the site and foundation have been pre-treated according to the set requirements.
第二桩施工方法的方法A中，静力触探头是纯用于检测的标准触探头或高强触探头。In Method A of the second pile construction method, the static probe is a standard probe or high-strength probe purely used for testing.
第二桩施工方法的方法B中的动力触探是触探头，触探杆、穿心锤组成的标准自由落体动力锤，或是类似改进型的三合一的高强自由落体动力锤。The dynamic cone penetration in Method B of the second pile construction method is a standard free fall dynamic hammer composed of a penetration probe, a penetration rod, and a penetrating hammer, or a similar improved three-in-one high-strength free-fall dynamic hammer.
本发明的填充料可以是土、砂等颗粒散体材料，或水泥土、水泥拌和物等胶结材料。The filler of the present invention may be granular materials such as soil and sand, or cementitious materials such as soil cement and cement mixture.
步骤（二）方法A及方法B中，外管护筒不上拔，作水泥土体中增强加劲体，用于复合地基；外管护筒加设热熔套，隔离膜、润滑油，用于基坑支护。Step (2) In method A and method B, the outer tube protection tube is not pulled up, and it is used as a reinforced stiffener in the cement-soil body for composite foundation; the outer tube protection tube is equipped with a hot melt sleeve, isolation film, and lubricant. In the foundation pit support.
步骤（二）方法A及方法B中，空心水泥土体空心腔内预埋设应力应变、钢筋应力计、传感光纤，桩身沉降管或桩端沉降管，用于科研试验，与实时监测。Step (2) In method A and method B, pre-embedded in the hollow cavity of the hollow cement-soil body with stress and strain gauges, reinforcing steel strain gauges, sensing optical fibers, pile sinking pipes or pile tip sinking pipes, for scientific research tests and real-time monitoring.
第一桩采用环状分段水泥土桩的形式，第二桩形成后，在第一桩上端设置环状钢套下压直至将胶结在一起的第一桩、第二桩分离破坏，以检测第一桩的水泥土体与第二桩的现浇桩身之间的摩擦力。The first pile is in the form of a ring-shaped segmented cement-soil pile. After the second pile is formed, a ring-shaped steel sleeve is set at the upper end of the first pile to be pressed down until the first and second piles cemented together are separated and destroyed for inspection The friction force between the cement-soil body of the first pile and the cast-in-situ pile of the second pile.
步骤（二）方法B中，自由落体锤留置水泥土中，用于基坑支护。Step (2) In method B, the free-falling hammer is left in the cement and soil for foundation pit support.
有益效果Beneficial effect
本发明形成的空心水泥土桩适用于复合地基，也适用于基坑支护；形成复合水泥土桩，适用于高强复合地基，也适用劲性复合桩、根固桩；本发明既能增加第一桩水泥土的质量强度，也能同步一体化施工检测第一桩水泥土的质量；同样也适用于工程勘察初勘阶段，一举多得。The hollow cement-soil pile formed by the present invention is suitable for composite foundation and foundation pit support; the composite cement-soil pile is formed, which is suitable for high-strength composite foundation, and is also suitable for rigid composite piles and root-fixed piles; The quality and strength of a pile of cement-soil can also be simultaneously integrated to detect the quality of the first pile of cement-soil; it is also suitable for the preliminary investigation stage of engineering investigation, which serves multiple purposes.
本发明的最佳实施方式The best mode of the invention
一种复合水泥土桩的检测施工方法，包括外围桩、芯桩的施工，外围桩即第一桩、芯桩即第二桩，包括下列步骤：A detection and construction method for composite cement-soil piles includes the construction of peripheral piles and core piles. The peripheral piles are the first pile and the core pile is the second pile, including the following steps:
（一）施工第一桩；(1) Construction of the first pile;
（二）施工第二桩：施工检测第一桩，并形成第二桩；(2) Construction of the second pile: construction inspection of the first pile and formation of the second pile;
包括下列方法之一Include one of the following methods
方法A：Method A:
（1）就位：将钻杆就位于已施工好的第一桩水泥土桩中心；(1) Position: Place the drill pipe at the center of the first cement-soil pile that has been constructed;
（2）下沉：将装有静力触探头的钻杆压入试验水泥土中，通过量测系统测水泥土的贯入阻力，确定水泥土的物理力学特性，直接检测水泥土的质量；如钻杆压入、静力触探有困难，则在钻杆外选配尺寸匹配的外管护筒，通过交互钻杆钻进、外管护筒跟进的方式，钻杆压入外管护筒，外管护筒依靠外力下沉至设定深度；间接检测水泥土的质量；同时外管护筒二次挤扩第一桩水泥土桩，提高水泥土桩的质量强度；(2) Sinking: Press the drill pipe with static probe into the test cement soil, measure the penetration resistance of the cement soil through the measurement system, determine the physical and mechanical properties of the cement soil, and directly detect the quality of the cement soil; If it is difficult to press-in the drill pipe and static penetration, an outer tube protection tube of matching size is selected outside the drill rod, and the drill rod is pressed into the outer tube through interactive drill rod drilling and follow-up of the outer tube protection tube The protective tube, the outer tube protective tube sinks to the set depth by external force; indirectly detects the quality of the cement-soil; at the same time, the outer tube protective tube secondarily expands the first cement-soil pile to improve the quality and strength of the cement-soil pile;
（3）上拔：将钻杆、外管护筒上拔至设定高度，形成空心水泥土桩第二桩，空心腔内回填填充料，形成桩身复合水泥土桩；空心腔底部封底、隔底或扩底，形成桩底复合水泥土桩；(3) Pull up: Pull up the drill pipe and the outer tube protection tube to the set height to form the second hollow cement-soil pile. The hollow cavity is backfilled with filler to form the pile body composite cement-soil pile; the bottom of the hollow cavity is sealed, Separate or expand the bottom to form a composite cement-soil pile at the bottom of the pile;
方法B：Method B:
（1）就位：将外管就位于施工好的第一桩水泥土桩中心；(1) Placement: Place the outer pipe at the center of the first cement-soil pile constructed;
（2）下沉：将装有动力触探触头、触探杆的穿心锤自由落体下沉至水泥土中，通过量测系统测标贯锤击数，确定水泥土的物理力学特性，直接检测水泥土的质量；如触探触头下沉、动力触探有困难，则在穿心锤外选配尺寸匹配的外管护筒，通过交互穿心锤自由落体下沉与外管外力下沉至设定深度，间接检测水泥土的质量；同时穿心锤外管护筒二次挤扩第一桩水泥土桩，提高水泥土桩的质量强度；(2) Subsidence: The penetrating hammer equipped with the dynamic penetration probe and the penetration rod is sunk into the cement soil freely, and the number of standard penetration hammers is measured by the measurement system to determine the physical and mechanical properties of the cement soil. Directly detect the quality of cement and soil; if the penetrating probe sinks and dynamic penetrating is difficult, the outer tube protection tube of matching size is selected outside the penetrating hammer, and the free fall sinking of the penetrating hammer is exchanged with the external force of the outer tube Sink to the set depth to indirectly detect the quality of cement-soil; at the same time, the outer pipe-protecting tube of the piercing hammer secondarily expands the first cement-soil pile to improve the quality and strength of the cement-soil pile;
（3）上拔：将穿心锤、外管护筒上拔至设定高度，形成空心水泥土桩第二桩；空心腔内回填填充料，形成桩身复合水泥土桩；空心腔底部封底、隔底或扩底，形成桩底复合水泥土桩。(3) Pull up: Pull the punching hammer and the outer tube protection tube up to the set height to form the second pile of hollow cement-soil pile; the hollow cavity is backfilled with filler to form the pile body composite cement-soil pile; the bottom of the hollow cavity is sealed , Separate or expand the bottom to form a composite cement-soil pile at the bottom of the pile.
所述第一桩的施工方法包括下列方法之一：The construction method of the first pile includes one of the following methods:
方法A：Method A:
（1）移机就位：移动设备，将钻杆就位于设定桩位上；(1) Move the machine into position: move the equipment and place the drill rod on the set pile position;
（2）旋压下沉：将钻杆旋压下沉至设定深度，根据土体情况，进行喷气、喷水、喷灰、喷浆中的一种或几种处理；(2) Spinning sinking: Spin down the drill pipe to a set depth, and perform one or more treatments of air jet, water spray, ash spray and grout according to the soil condition;
（3）旋拉上提：将钻杆旋拉上提至设定高度，根据土体情况，进行喷气、喷水、喷灰、喷浆中的一种或几种处理；(3) Rotary pull up: Rotate the drill pipe up to the set height, and perform one or more treatments of air jet, water jet, ash jet and grout according to the soil conditions;
（4）重复（2）和（3），至第一桩满足设定要求；(4) Repeat (2) and (3) until the first pile meets the set requirements;
方法B：Method B:
（1）移机就位：移动设备，将外管就位于设定桩位上；(1) Move the machine into place: move the equipment and place the outer tube on the set pile position;
（2）沉管：将外管沉管下沉至设定深度，将预拌水泥土回灌外管内；(2) Immersed pipe: sink the immersed pipe of the outer pipe to the set depth, and pour the ready-mixed cement soil back into the outer pipe;
（3）拔管：将外管上拔至设定高度，至回灌水泥土桩满足设定要求。(3) Extubation: Pull the outer tube up to the set height until the cement-soil pile is filled to meet the set requirements.
施工第一桩时，根据设定要求，场地与地基已经做好预处理。When constructing the first pile, the site and foundation have been pre-treated according to the set requirements.
第二桩施工方法的方法A中，静力触探头是纯用于检测的标准触探头或高强非标触探头。In Method A of the second pile construction method, the static probe is a standard probe or a high-strength non-standard probe purely used for testing.
第二桩施工方法的方法B中的动力触探是触探头，触探杆、穿心锤组成的标准自由落体动力锤，或是类似改进型的三合一的非标高强自由落体动力锤。The dynamic cone penetration in Method B of the second pile construction method is a standard free fall dynamic hammer consisting of a penetration probe, a penetration rod, and a penetrating hammer, or a similarly improved three-in-one non-standard high-strength free-fall dynamic hammer.
本发明的填充料可以是土、砂等颗粒散体材料，或水泥土、水泥拌和物等胶结材料。The filler of the present invention may be granular materials such as soil and sand, or cementitious materials such as soil cement and cement mixture.
步骤（二）方法A及方法B中，外管护筒不上拔，作水泥土体中增强加劲体，用于复合地基；外管护筒加设热熔套，隔离膜、润滑油，用于基坑支护。Step (2) In method A and method B, the outer tube protection tube is not pulled up, and it is used as a reinforced stiffener in the cement-soil body for composite foundation; the outer tube protection tube is equipped with a hot melt sleeve, isolation film, and lubricant. In the foundation pit support.
步骤（二）方法A及方法B中，空心水泥土体空心腔内预埋设应力应变、钢筋应力计、传感光纤，桩身沉降管或桩端沉降管，用于科研试验，与实时监测。Step (2) In method A and method B, pre-embedded in the hollow cavity of the hollow cement-soil body with stress and strain gauges, reinforcing steel strain gauges, sensing optical fibers, pile sinking pipes or pile tip sinking pipes, for scientific research tests and real-time monitoring.
第一桩采用环状分段水泥土桩的形式，第二桩形成后，在第一桩上端设置环状钢套下压直至将胶结在一起的第一桩、第二桩分离破坏，以检测第一桩的水泥土体与第二桩的现浇桩身之间的摩擦力。The first pile is in the form of a ring-shaped segmented cement-soil pile. After the second pile is formed, a ring-shaped steel sleeve is set at the upper end of the first pile to be pressed down until the first and second piles cemented together are separated and destroyed for inspection The friction force between the cement-soil body of the first pile and the cast-in-situ pile of the second pile.
步骤（二）方法B中，自由落体锤留置水泥土中，用于基坑支护。Step (2) In method B, the free-falling hammer is left in the cement and soil for foundation pit support.

Claims (8)

  1. 一种复合水泥土桩的检测施工方法，包括外围桩、芯桩的施工，外围桩即第一桩、芯桩即第二桩，其特征是：包括下列步骤：A detection and construction method for composite cement-soil piles includes the construction of peripheral piles and core piles. The peripheral piles are the first pile and the core pile is the second pile, and are characterized by the following steps:
    （一）施工第一桩；(1) Construction of the first pile;
    （二）施工第二桩：施工检测第一桩，并形成第二桩；(2) Construction of the second pile: construction inspection of the first pile and formation of the second pile;
    包括下列方法之一Include one of the following methods
    方法A：Method A:
    （1）就位：将钻杆就位于已施工好的第一桩水泥土桩中心；(1) Position: Place the drill pipe at the center of the first cement-soil pile that has been constructed;
    （2）下沉：将装有静力触探头的钻杆压入试验水泥土中，通过量测系统测水泥土的贯入阻力，确定水泥土的物理力学特性，直接检测水泥土的质量；如钻杆压入、静力触探有困难，则在钻杆外选配尺寸匹配的外管护筒，通过交互钻杆钻进、外管护筒跟进的方式，钻杆压入外管护筒，外管护筒依靠外力下沉至设定深度；间接检测水泥土的质量；同时外管护筒二次挤扩第一桩水泥土桩，提高水泥土桩的质量强度；(2) Sinking: Press the drill pipe with static probe into the test cement soil, measure the penetration resistance of the cement soil through the measurement system, determine the physical and mechanical properties of the cement soil, and directly detect the quality of the cement soil; If it is difficult to press-in the drill pipe and static penetration, an outer tube protection tube of matching size is selected outside the drill rod, and the drill rod is pressed into the outer tube through interactive drill rod drilling and follow-up of the outer tube protection tube The protective tube, the outer tube protective tube sinks to the set depth by external force; indirectly detects the quality of the cement-soil; at the same time, the outer tube protective tube secondarily expands the first cement-soil pile to improve the quality and strength of the cement-soil pile;
    （3）上拔：将钻杆、外管护筒上拔至设定高度，形成空心水泥土桩第二桩，空心腔内回填填充料，形成桩身复合水泥土桩；空心腔底部封底、隔底或扩底，形成桩底复合水泥土桩；(3) Pull up: Pull up the drill pipe and the outer tube protection tube to the set height to form the second hollow cement-soil pile. The hollow cavity is backfilled with filler to form the pile body composite cement-soil pile; the bottom of the hollow cavity is sealed, Separate or expand the bottom to form a composite cement-soil pile at the bottom of the pile;
    方法B：Method B:
    （1）就位：将外管就位于施工好的第一桩水泥土桩中心；(1) Placement: Place the outer pipe at the center of the first cement-soil pile constructed;
    （2）下沉：将装有动力触探触头、触探杆的穿心锤自由落体下沉至水泥土中，通过量测系统测标贯锤击数，确定水泥土的物理力学特性，直接检测水泥土的质量；如触探触头下沉、动力触探有困难，则在穿心锤外选配尺寸匹配的外管护筒，通过交互穿心锤自由落体下沉与外管外力下沉至设定深度，间接检测水泥土的质量；同时穿心锤外管护筒二次挤扩第一桩水泥土桩，提高水泥土桩的质量强度；(2) Subsidence: The penetrating hammer equipped with the dynamic penetration probe and the penetration rod is sunk into the cement soil freely, and the number of standard penetration hammers is measured by the measurement system to determine the physical and mechanical properties of the cement soil. Directly detect the quality of cement and soil; if the penetrating probe sinks and dynamic penetrating is difficult, the outer tube protection tube of matching size is selected outside the penetrating hammer, and the free fall sinking of the penetrating hammer is exchanged with the external force of the outer tube Sink to the set depth to indirectly detect the quality of cement-soil; at the same time, the outer pipe-protecting tube of the piercing hammer secondarily expands the first cement-soil pile to improve the quality and strength of the cement-soil pile;
    （3）上拔：将穿心锤、外管护筒上拔至设定高度，形成空心水泥土桩第二桩；空心腔内回填填充料，形成桩身复合水泥土桩；空心腔底部封底、隔底或扩底，形成桩底复合水泥土桩。(3) Pull up: Pull the punching hammer and the outer tube protection tube up to the set height to form the second pile of hollow cement-soil pile; the hollow cavity is backfilled with filler to form the pile body composite cement-soil pile; the bottom of the hollow cavity is sealed , Separate or expand the bottom to form a composite cement-soil pile at the bottom of the pile.
  2. 根据权利要求1所述的复合水泥土桩的检测施工方法，其特征是：所述第一桩的施工方法包括下列方法之一：The detection and construction method of the composite cement-soil pile according to claim 1, wherein the construction method of the first pile includes one of the following methods:
    方法A：Method A:
    （1）移机就位：移动设备，将钻杆就位于设定桩位上；(1) Move the machine into position: move the equipment and place the drill rod on the set pile position;
    （2）旋压下沉：将钻杆旋压下沉至设定深度，根据土体情况，进行喷气、喷水、喷灰、喷浆中的一种或几种处理；(2) Spinning sinking: Spin down the drill pipe to a set depth, and perform one or more treatments of air jet, water spray, ash spray and grout according to the soil condition;
    （3）旋拉上提：将钻杆旋拉上提至设定高度，根据土体情况，进行喷气、喷水、喷灰、喷浆中的一种或几种处理；(3) Rotary pull up: Rotate the drill pipe up to the set height, and perform one or more treatments of air jet, water jet, ash jet and grout according to the soil conditions;
    （4）重复（2）和（3），至第一桩满足设定要求；(4) Repeat (2) and (3) until the first pile meets the set requirements;
    方法B：Method B:
    （1）移机就位：移动设备，将外管就位于设定桩位上；(1) Move the machine into place: move the equipment and place the outer tube on the set pile position;
    （2）沉管：将外管沉管下沉至设定深度，将预拌水泥土回灌外管内；(2) Immersed pipe: sink the immersed pipe of the outer pipe to the set depth, and pour the ready-mixed cement soil back into the outer pipe;
    （3）拔管：将外管上拔至设定高度，至回灌水泥土桩满足设定要求。(3) Extubation: Pull the outer tube up to the set height until the cement-soil pile is filled to meet the set requirements.
  3. 根据权利要求1或2所述的复合水泥土桩的检测施工方法，其特征是：施工第一桩时，根据设定要求，场地与地基已经做好预处理。The detection and construction method of composite cement-soil piles according to claim 1 or 2, characterized in that: when the first pile is constructed, the site and the foundation have been pre-treated according to the set requirements.
  4. 根据权利要求1或2所述的复合水泥土桩的检测施工方法，其特征是：第二桩施工方法的方法A中，静力触探头是纯用于检测的标准触探头或高强触探头。The detection and construction method for composite cement-soil piles according to claim 1 or 2, characterized in that: in method A of the second pile construction method, the static touch probe is a standard touch probe or a high-strength touch probe purely used for testing.
  5. 根据权利要求1或2所述的复合水泥土桩的检测施工方法，其特征是：第二桩施工方法的方法B中的动力触探是触探头，触探杆、穿心锤组成的标准自由落体动力锤，或是类似改进型的三合一的高强自由落体动力锤。The testing construction method for composite cement-soil piles according to claim 1 or 2, characterized in that: the dynamic sounding in Method B of the second pile construction method is a touch probe, a standard free probe consisting of a sounding rod and a core hammer Falling power hammer, or a similar improved three-in-one high-strength free falling power hammer.
  6. 根据权利要求1或2所述的复合水泥土桩的检测施工方法，其特征是：步骤（二）方法A及方法B中，外管护筒不上拔，作水泥土体中增强加劲体，用于复合地基；外管护筒加设热熔套，隔离膜、润滑油，用于基坑支护。The detection and construction method of composite cement-soil pile according to claim 1 or 2, characterized in that: in step (2) method A and method B, the outer tube protection tube is not pulled up and used as a reinforced stiffener in the cement-soil body, It is used for composite foundation; the outer tube protection tube is equipped with hot melt sleeve, isolation film and lubricating oil, which is used for foundation pit support.
  7. 根据权利要求1或2所述的复合水泥土桩的检测施工方法，其特征是：步骤（二）方法A及方法B中，空心水泥土体空心腔内预埋设应力应变、钢筋应力计、传感光纤，桩身沉降管或桩端沉降管。The detection and construction method of composite cement-soil piles according to claim 1 or 2, characterized in that: in step (2) method A and method B, pre-embedded in the hollow cavity of the hollow cement-soil body with stress and strain, steel bar stress gauge, transmission Sensing fiber, pile body settlement pipe or pile end settlement pipe.
  8. 根据权利要求1或2所述的复合水泥土桩的检测施工方法，其特征是：第一桩采用环状分段水泥土桩的形式，第二桩形成后，在第一桩上端设置环状钢套下压直至将胶结在一起的第一桩、第二桩分离破坏，以检测第一桩的水泥土体与第二桩的现浇桩身之间的摩擦力。The detection and construction method of composite cement-soil piles according to claim 1 or 2, characterized in that: the first pile adopts the form of ring-shaped segmented cement-soil pile, and after the second pile is formed, a ring-shaped pile is arranged at the upper end of the first pile The steel sleeve is pressed down until the first and second piles that are cemented together are separated and destroyed to detect the friction between the cement-soil body of the first pile and the cast-in-situ pile body of the second pile.
PCT/CN2019/106655 2019-04-17 2019-09-19 Inspection and construction method for composite cement-soil pile WO2020211285A1 (en)

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