1、9.2 design 9.2.1首先在地面测量放线,确定分离式的门架式加筋水泥土地连墙位置,按测量准确的位置首先施作垂直间隔分离式两排加筋水泥土墙,水泥土中插筋时(最好是在未凝固之前插入,插筋或型钢可采取震动挤压法或锤击法),接着在地表面施作大直径水泥土地锚,锚筋同三角形支护的材料相同。9.2.1 measuring unreeling the ground first, determine the separated type conveyor reinforced cement soil wall position, according to measure accurately the
2、position of the first vertical interval separate two rows of reinforced cement wall, steel dowel in soil (preferably in insert before solidification, steel dowel or steel can take vibration extrusion method or hammering method), and then applied to the ground surface for large diameter cement soil a
3、nchor, the anchor reinforcement with triangle supporting materials are the same. 9.2.2在水泥土地锚的顶部及门架式桩墙的顶部设置钢筋混凝土压板,设置厚度为0.20.3m,宽度与门架式及地锚的宽度总合一致宽,典型的门架式加筋水泥土支护结构布置示于图9.1。9.2.2 at the top of the cement soil anchor and pile wall at the top of the set of reinforced concrete plate conveyor, set the thick
4、ness of 0.2 0.3 m, width is consistent with the portal and the width of the anchor combined wide, typical portal reinforced cement-soil retaining structure arrangement is shown in figure 9.1. 9.2.3加筋水泥土桩墙+水泥土地锚的结构设计同8.2.19.2.3 reinforced cement-soil pile wall with 8.2.1 + cement soil anchor structur
5、e design 9.2.3垂直的加筋水泥土桩置换率砂层为15%,淤泥层为20%,两桩咬合1015公分,桩垂直率0.5%。9.2.3 vertical reinforced cement-soil pile sand replacement rate was 15%, the silt layer was 20%, the two bite 10 15 cm, pile vertical rate was 0.5%. 9.2.4水泥土地锚平面分布一般为1.01.5米,长度是基坑深度的一倍,即1/2。9.2.4 cement soil anchor plane distribution gene
6、rally is 1.0 1.5 m, length is a times the depth of foundation pit, namely, 1/2. 9.2.5大直径水泥土地锚直径不小于0.350.5m,在砂类土、淤泥层中不应小于0.51.0米。9.2.5 large diameter cement soil anchor diameter not less than 0.35 0.5 m, in sand soil, silt layer should not be less than 0.5 1.0 m. 9.2.6加筋水泥土桩墙+水泥土地锚的结构设计同8.2.19.2.6 re
7、inforced cement-soil pile wall with 8.2.1 + cement soil anchor structure design 9.2.7计算式9.2.7 calculation formula 采用北方交通大学地下隧道岩土研究所的LXK工法计算理论。By the northern jiaotong university institute of underground tunnel geotechnical LXK method calculation theory. 9.3施工9.3 the construction 9.3.1三角型水泥土加筋挡土结构的施工
8、场地应事先平整,测量,放线,定位,搅拌水泥土桩墙的施工放线必需经过业主、监理、施工三方严格验收后确认无错,开工时如地下有障碍物,延施工线应先挖导向沟宽度为1.5米、深度为2.0米并清除地上地下障碍物,场地低洼时应回填粘性土,地表过软时,应采取防止施工机械失稳的措施。9.3.1 triangular cement-soil reinforced soil retaining structure of the construction site should level off, the measurement, pay-off, positioning, mixing cement-soil p
9、ile wall construction steel required by the owner, supervision, construction strictly confirm error free after acceptance, the construction such as underground there are obstacles, to delay the construction line should be dug guide groove width of 1.5 meters, the depth of 2.0 meters underground obst
10、acles and clear the ground, ground should be backfilled clay, low-lying surface is too soft, should take measures to prevent the unstability of the construction machinery. 9.3.2,施工测放的轴线经复核后应妥善保护,垂直水泥土桩位误差不应大于500毫米。9.3.2, construction measurement of axis after review should be properly protected, ver
11、tical cement-soil pile location error should not be greater than 500 mm. 9.3.3施工前应做好施工机具的安装和调试工作。9.3.3 should be ready before the construction of construction machinery installation and commissioning work. 9.3.4灰浆泵的输浆量、灰浆经输浆管到达喷浆口的时间等均应在施工前标定。水泥土施工工艺应根据设计要求和实测的各项施工参数综合确定。施工时必须严格控制浆液水灰比,水灰比不应大于0.50。9
12、.3.4 mortar volume of slurry pump, slurry by the slurry pipe such as time of arrival in spray mouth shall be calibrated before construction. Soil-cement construction technology should be based on the design requirements and the comprehensive construction parameters measured. Must be strictly control
13、led during the construction of slurry water cement ratio, water cement ratio should not be greater than 0.50. 9.3.5深层搅拌桩的垂直度应通过调整设备的平整度和导向架对地面的垂直度进行控制,桩身垂直度偏差不应大于1.5%。对设计要求搭接成壁的桩应连续施工,相邻桩施工间隔时间不应超过24小时。9.3.5 deep mixing pile verticality by adjusting device should be smoothness and guide frame to con
14、trol the ground vertical degree, pile verticality deviation should not be greater than 1.5%. Design requirements for lap into wall pile shall be continuous construction, the time interval between adjacent pile construction should not be more than 24 hours. 9.3.6锚杆施工应符合下列要求:9.3.6 shall anchor constru
15、ction shall meet the following requirements: 锚杆钻孔误差不宜大于100mm,偏斜度不应大于3%。(1) the bolt hole error should not be greater than 100 mm, skewness should not be greater than 3%. 锚固段强度大于15Mpa并达到设计强度等级的75%后方可进行张拉;(2) the anchoring strength is greater than 15 mpa and rear design strength grade of 75% can be te
16、nsioned; 锚杆张拉顺序应考虑对邻近锚杆的影响,宜采用跳跃张拉;(3) the bolt tensioning sequence should be considered influence on adjacent anchor, appropriate USES jump tension; 锚杆锚固段的间距不应小于6D(D为锚杆孔直径),且不小于1m;(4) of the anchor rod anchor spacing should be not less than 6 D for the bolt hole diameter (D), and no less than 1 m;
17、锚杆张拉宜在压顶梁达到设计强度后方可张拉。(5) the bolt tensioning appropriate in the capping beam rear can meet the design strength tension. 10、LXK工法加筋水泥土桩墙与多排水泥土地锚支护结构(专利号:ZL.7)10, LXK act can reinforced cement-soil pile wall and drainage soil anchor supporting structure (patent number: ZL.7) 10.1.1基坑周围不具备放坡条件,土体为软流塑状态
18、的淤泥、淤泥质土、含水量丰富的各类砂土,基坑外地下空间允许锚杆或土钉占用时,可采用水泥土地锚支护的基坑边坡。10.1.1 around the foundation pit slope does not have to put conditions, the soil is soft plastic flow state of silt, silt soil, rich in all kinds of sand water content, foundation pit under the outside space allows anchor and soil nail to take up
19、, can use concrete anchor bracing of foundation pit slope land. 10.1.2场地土质软弱松散且均匀,基坑开挖深度在820m以内时可采用多排水平向、斜向大直径水泥土地锚与加筋水泥土桩墙构成的加固土体支护10.1.2 uniform field soil loose and weak, when the excavation depth within 8 20 m can be used to row level, more inclined to large diameter cement soil anchor and reinf
20、orced cement-soil pile wall structure of reinforced soil bolting 结构。Structure. 10.1.3加筋水泥土地下连续墙所插的筋可以是钢管、槽钢、工字钢及粗钢筋、钢绞线,其中钢绞线可采用钻进代入。10.1.3 reinforced concrete continuous wall under the land can be inserted by the steel pipe, channel steel, i-steel and crude steel, steel wire, steel strand of drilli
21、ng plug can be used. 10.1.4大直径水泥土地锚可以是粗钢筋,也可以是钢绞线,底部最好是设置扩大头或是多支盘状水泥土地锚的结构体。10.1.4 large diameter cement soil anchor can be crude steel, also can be steel strand, best is set to expand at the bottom of the head or multivessel disc structure of cement soil anchor. 典型支护详见图10.1。The typical supporting d
22、etailed in figure 10.1. 10.1.5垂直向的水泥土地下连续墙除了钢绞线和粗钢筋外,其它型钢均可根据需要插在水泥土中或水泥土桩墙的外侧,同水泥土桩靠紧。10.1.5 continuous wall under the vertical cement land besides crude steel and steel strand, other sections can be according to the need to plug in the soil or the outer edge of the cement-soil pile wall, with ceme
23、nt-soil pile on tight. 10.1.6多排斜向大直径水泥土地锚直径经计算一般为0.351.0m,锚体顶部应与腰梁连结,一般需施加预应力。10.1.6 row more inclined to large diameter cement soil anchor diameter by calculating average of 0.35 1.0 m, the top should anchor and waist beam connections, general need for prestressing. 10.1.7水泥土加筋桩墙的桩径偏差不应大于50mm,垂直度偏差
24、不宜大于0.5%。10.1.7 cement-soil pile wall reinforcement of pile diameter deviation should not be greater than 50 mm, verticality deviation should not be greater than 0.5%. 10.1.8水泥土桩身插筋应在桩顶搅拌完成后及时进行,插筋材料、插入长度和出露长度等均应按计算和构造要求确定。10.1.8 cement-soil pile steel dowel should stir at the top of the pile is com
25、pleted in a timely manner, reinforcement materials, insert length and outcropped length shall be according to the calculation and construction requirement. 10.2水泥土地锚支护10.2 cement soil anchor bolting 10.2.1水泥土地锚支护是以直径大较密排列的横向、斜向对软弱土体进行加固补强,超前的制约了软土的应力,通过多排水泥土地锚与土体、加筋水泥土桩墙共同工作,形成补强加固复合土体,达到稳定边坡的目的,适用于
26、基坑以上的软土体加固。10.2.1 cement soil anchor bolting with large diameter densely arranged transverse and oblique to the reinforcement of soft soil with reinforcement, the restriction of the stress of the soft soil in advance, through multiple drainage soil anchor and soil, reinforced cement-soil pile wall w
27、ork together, to form reinforcement reinforcement composite foundation, achieve the purpose of slope stability, is suitable for the foundation pit of soft soil consolidation. 10.2.2竖直向插入的筋和型钢可以在支护结构失去作用时回收,斜向多排地锚的筋可以采用金属筋,也可以采用非金属筋,金属筋在回填土时可以回收。10.2.2 vertical to insert the retaining structure reinf
28、orcement and steel can be lost function recovery, oblique line of anchor reinforcement can use more metal bar, also can use non-metal reinforced, metal bar in the backfill soil can be recycled. 10.2.3水泥土加筋墙与水泥土地锚支护的设计10.2.3 reinforced wall cement-treated soil and cement soil anchor bolting design 设计
29、前应查明场地周围已有建筑物、埋设物、道路交通,工程范围内的土层分布,土性指标及地下水变化等情况,判断LXK工法支护护坡的适用性。(1) the design should examine the existing buildings, around before embedding, road traffic, project within the scope of the soil layer distribution, localized indicators and groundwater changes, etc., determine the LXK act can support
30、the applicability of the slope protection. LXK工法水泥土加筋墙与水泥土地锚支护工程设计包括下列内容:(2) the LXK act can reinforced wall cement-treated soil and cement soil anchor bolting design include the following contents:1)确定加固边坡的平面、剖面尺寸及分段施工高度;1) determine the reinforcement of the slope plane, section size and section co
31、nstruction height;2)设计加筋水泥土墙厚度、深度及插入的筋体材料、长度;2) the design of reinforced concrete retaining wall thickness, depth and insertion of geotextile material, length;3)设计水泥土地锚的直径、间距、长度、倾角、地锚布置及锚筋的材料选择;3) the design of the cement soil anchor diameter, spacing, length, Angle, anchor and anchor reinforcement material selection;4)设计加筋水泥土面墙刚度及每开挖1.52.0m深度时的稳定性和渗水性能;4) design of reinforced cement-soil wal
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